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Exponential Function Formula
In realworld applications, the exponential function is a class of mathematical function. In mathematical models, knowing the exponential decay or growth model is helpful. It is critical to comprehend descriptor rules, ideas, structures, graphs, interpreter series, work formulas, and illustrations of exponentbased functions in this topic.
Quick Links
ToggleWhat is Exponential Function?
The exponential function determines whether an exponential curve grows or decays. Either exponential decay or exponential growth describes a quantity that changes at regular intervals by a defined ratio (or fixed percentage). The exponential model is used in the compound interest formula to calculate the function’s compound interest value. Always a onetoone function, the exponential function.
When there is exponential growth, the quantity increases slowly at first and subsequently swiftly. Over time, the exponential function’s pace of change will quicken. As time goes on, the rate of growth accelerates. An “exponential increase” is what the ascent growth means.
Exponential Function Definition
The exponential function is a type of mathematical function that can be used to determine if anything is increasing or decreasing exponentially, such as population, money, or price. Jonathan was reading a news story about the most recent bacterial growth study. He had read that one bacteria had been used in an experiment. The bacterium doubled in size and had two by the end of the first hour. The number was four after the second hour. The number of bacteria was growing hourly. If this pattern holds, he wondered how many bacteria there would be in 100 hours. When he asked his teacher about the same thing, the concept of an exponential function was the response he received.
Exponential Function Examples
To understand exponential growth or decay, it is crucial to practice questions related to the Exponential Function Formula. All the questions related to exponential growth can be solved by applying the Exponential Function Formula.
Exponential Function Formula
In Mathematics, an Exponential Function Formula is a relationship of the type y = ax, where x is an independent variable that spans the entire real number line and is expressed as the exponent of a positive number. The exponential function y = ex, sometimes written y = exp (x), in which e (2.7182818…) is the base of the natural system of logarithms, is arguably the most significant of the exponential functions. Since x is a logarithm by definition, the inverse of the Exponential Function Formula is a logarithmic function.
Exponential Function Graph
The graph of an Exponential Function Formula is known as an exponential graph. There is never a vertical asymptote, only a horizontal one. Plotting the horizontal asymptote, intercepts, and a few points can be used to graph an Exponential Function Formula. A curve that depicts an exponential function is known as an exponential graph. A curve with a horizontal asymptote and either an increasing slope or a decreasing slope is called an exponential graph. i.e., it begins as a horizontal line, increases or drops gradually, and then the growth or decay accelerates. It may or may not cut the xaxis, but it always cuts the yaxis at some point. In other words, an exponential graph always has a yintercept while an xintercept may or may not be present.
An Exponential Function Formula graph is useful in studying the properties of exponential functions. The curve steepens as the exponent increases, as shown by the graph of x’s exponents. Additionally, the rate of expansion quickens. The graph of an exponential function has a horizontal asymptote and either an ascending or descending curve. The graph of the basic exponential function y=ax can be used to gain a thorough understanding of the traits of Exponential Function Formula.
When a>1, the graph strictly increases as x. The graph will pass through (0,1) regardless of the value of a because a0 = 1.
Exponential Function Asymptotes
Exponential Function Formula asymptotes can be found in two steps. Examine the graph’s behaviour as x climbs and lowers in step one. A horizontal asymptote exists for an exponential function. An exponential function’s graph appears to be slowing down and beginning to flatten out when it gets close to the horizontal asymptote, but it never truly does.
Find the horizontal line that the graph is about to cross in step two. y = c is a general equation for a horizontal line.
The graph of a linear equation is a straight line with a constant or steady upward trend. In contrast, the graph of the exponential equation displays an increasing rate that creates a curve rather than a straight line. Because the powers in an Exponential Function Formula, such as 23 = 2 * 2 * 2, dictate how many times the base number should be multiplied by itself, we are constantly multiplying by the same value as the power grows. Because y climbs gently at first and then quickly as x values rise, the graph appears curved or concave.
Domain and Range of Exponential Function
The range of possible values that an independent variable can have is known as the domain of a function. The dependent variable’s potential values as x varies across the domain and are referred to as the range.
It is easier to decide where the function would not exist when determining the domain. It is crucial to only take the logarithm of values bigger than 0, for instance. Keeping in mind that exponential and logarithmic functions are inverse functions, it follows that an exponential’s domain is such that x £ R, but its range will be greater than 0.
All real numbers comprise the exponential function’s domain. All real integers greater than zero fall inside the range. For all exponential functions, the line y = 0 serves as the horizontal asymptote. When an is greater than 1, the Exponential Function Formula grows as x grows and shrinks as x shrinks. On the other hand, when 0 a 1, the function increases as x decreases and decreases as x increases.
When modelling the behaviour of systems whose relative growth rate is constant, the natural Exponential Function Formula is particularly helpful and pertinent. Populations, bank accounts, and other similar circumstances are examples of these. Let f (x), where x is a unit of time, model the growth (or decay) of something.
Exponential Series
Consider the growth of money in a bank account earning a certain annual interest rate, r%. ( the letter r is used instead of a number so that the result is applicable to any number.) Learning a new language is one of the initial obstacles in solving problems with Exponential Function Formula. “Annual interest” means that what is in the bank account is multiplied by the interest rate, r, and the result is added to what is already there each year (the principal).
For each year following the initial deposit, this means one is calculating this year’s interest based not only on the initial deposit but also on last year’s interest. This is known as compound growth or compound interest.
Exponential Function Rules
According to the first law, one can multiply two Exponential Function Formula with the same base by adding their respective exponents. According to the second law, the exponents must be subtracted in order to divide two Exponential Function Formula with the same base. According to the third law, one must multiply the exponents in order to raise a power to a new power. According to the fourth and fifth laws, one must raise each factor to its corresponding power in order to raise a product or quotient to that power. The rules of functions are all observed by Exponential Function Formula. They have their own particular set of laws too, as they are a part of their own distinct family. Some fundamental guidelines that pertain to Exponential Function Formula are listed in the list below:
Except when b = 1, the parent Exponential Function Formula f(x) = bx always has a horizontal asymptote at y = 0. A positive number cannot be raised to any power and result in 0 or a negative number.
Equality Property of Exponential Function
This characteristic comes in handy when solving an exponential equation with the same bases. It states that if the bases on both sides of an exponential equation are equal, the exponents must be equal as well.
The Exponential Function Formula can be used to model objects that do not have negative values and grow or decay rapidly. They are frequently seen when examining things like the quantity of microorganisms in a culture or investments that produce compound interest. These are illustrations of exponential growth. There are additional examples of the Exponential Function Formula being used to describe the decay of radioactive isotopes. These are illustrations of exponential decay.
The function machine metaphor, which accepts inputs for variable x and produces outputs f, can be used to represent the behaviour of a certain Exponential Function Formula, f(x) (x). The function machine concept is useful for introducing parameters into a function. The two exponential functions f(x) and g(x) above are distinct from one another, yet the only difference is a change in the exponentiation base from 2 to 1/2. The Exponential Function Formula is useful in a variety of contexts, such as population growth, radioactive decay, and compound interest (money).
However, in the vast majority of cases, the function is not of the form f(x) = bx. Constants are routinely multiplied or added to make modifications.
Radioactive decay is the bestknown example of exponential decay. Radioactive elements only live a halflife. This is the amount of time it takes for an element’s mass to decay in half and transform into something else. For example, uranium238 is a radioactive element that slowly decays with a halflife of approximately 4.47 billion years. According to this, it will take that long to convert 100 grammes of uranium238 into 50 grammes of uranium238 (the other 50 grammes will have turned into another element).
An Exponential Function Formula graph aids in the study of Exponential Function Formula properties. The graph of x’s exponents shows how the curve steepens as the exponent grows larger. The rate of expansion is also quickening. The graph of an exponential function is made up of an ascending or descending curve with a horizontal asymptote. A thorough understanding of the characteristics of exponential functions can be obtained by taking a look at the graph of the fundamental Exponential Function Formula y=ax.
The graph appears to strictly grow as x when a>1. Due to the fact that a0 = 1, the graph will pass through (0,1) regardless of the value of a. The graph represents that it is completely above the xaxis.
Exponential Function Derivative
The complex Exponential Function Formula, with the exception of 0, accepts all complex numbers and is closely connected to the complex trigonometric functions, as seen by Euler’s formula.
Motivated by the exponential function’s more abstract features and characterisations, the Exponential Function Formula can be generalised to and constructed for whole various types of mathematical objects (for example, a square matrix or a Lie algebra). Exponential Function Formula are used to model a relationship in which a constant change in the independent variable results in the same proportionate change (that is, a percentage rise or decrease) in the dependent variable. This occurs frequently in the scientific and social sciences, such as in a selfreplicating population, a compounding fund, or a developing corpus of industrial expertise. Thus, the Exponential Function Formula can be found in Physics, Computer Science, Chemistry, Engineering, Mathematical Biology and Economics.
Integration of Exponential Function
Integration is the inverse process of differentiation and is one of the most essential ideas in calculus. It reflects the sum of discrete data and is used to generate functions that describe volume, area, and displacement. Because they are comprised of discrete data, these functions cannot be assessed separately.
The exponential function’s derivative (pace of change) is the exponential function itself. More broadly, an exponential function expresses a function with a rate of change proportional to the function itself (rather than equal to it). This function attribute causes exponential growth or decay.
The Exponential Function Formula encompasses the entire complex plane. Euler’s formula links trigonometric functions to their values at entirely imaginary arguments. The Exponential Function Formula includes analogues in which the argument is a matrix or even a Banach algebra or Lie algebra member.
Examples on Exponential Function
It is necessary to practice questions related to the Exponential Function Formula. Revising the theories is also essential. Practising questions on a regular basis helps in understanding theories in detail. Students will learn the right implementation of the Exponential Function Formula by practising questions. Students are expected to pay more attention to difficult topics. The topics related to the Exponential Function Formula can be understood well by paying attention to the graphs. Each of the graphs is crucial for solving examples.
Practice Questions on Exponential Functions
All the topics including the Exponential Function Formula need to be revised again and again. Practising questions from time to time helps in boosting the confidence of students. It also helps in retaining the Exponential Function Formula for a long time in memory. Each of the chapters in the Mathematics syllabus need to be mastered in order to score well in the final examination of Mathematics. The Extramarks learning platform has all the study materials for students of all classes. Students can score well in their upcoming examinations by taking help from the study materials of Extramarks. They can also access solutions to exercises of every subject in their course.
FAQs (Frequently Asked Questions)
1. What is the Exponential Function Formula?
The Exponential Function Formula is denoted by y= ex. It is necessary to learn the types of exponential functions and practice questions related to each one of them. Students are advised to focus on the graphs related to the topic to answer questions based on the domain and range of exponential functions.
2. Where can students access solutions to problems related to exponential functions?
The NCERT solutions provided by Extramarks can be used to solve questions related to exponential functions. The NCERT solutions are designed by expert Mathematics teachers and are very significant from the examination perspective. Students can also access NCERT solutions for other chapters in Mathematics from Extramarks.