Rewriting as an Exponential Equation

Oct 13, 2025 by wbrum.org 82 views

Introduction

Exponential equations are a fundamental concept in mathematics, and rewriting them in a specific format can make them easier to solve. In this article, we will discuss how to replace certain symbols in an exponential equation and rewrite it in a more manageable form. We will also provide a step-by-step guide on how to solve the rewritten equation.

The Original Equation

The original equation is given as:

\frac{dN}{dt} = rN \times 10^{14}

where $N$ is the population size, $r$ is the growth rate, and $t$ is time.

Replacing Symbols

To rewrite the equation, we need to replace the symbol $$M$$ with $$\square$$ and the symbol / with $$\qquad$$.

The equation becomes:

\frac{dN}{\qquad t} = rN \times \square \times 10^{14}

Rewriting as an Exponential Equation

To rewrite the equation as an exponential equation, we need to isolate the exponential term. We can do this by dividing both sides of the equation by $N$ .

\frac{dN}{\qquad tN} = r \times \square \times 10^{14}

Next, we can rewrite the left-hand side of the equation as a derivative.

\frac{d}{\qquad t} \ln(N) = r \times \square \times 10^{14}

Solving the Equation

To solve the equation, we need to isolate the variable $N$ . We can do this by integrating both sides of the equation with respect to time.

\int \frac{d}{\qquad t} \ln(N) dt = \int r \times \square \times 10^{14} dt

Evaluating the integrals, we get:

\ln(N) = r \times \square \times 10^{14}t + C

where $C$ is the constant of integration.

Solving for N

To solve for $N$ , we can exponentiate both sides of the equation.

N = e^{r \times \square \times 10^{14}t + C}

Conclusion

In this article, we discussed how to replace certain symbols in an exponential equation and rewrite it in a more manageable form. We also provided a step-by-step guide on how to solve the rewritten equation. By following these steps, we can easily solve exponential equations and gain a deeper understanding of the underlying mathematics.

Key Takeaways

Replacing symbols in an exponential equation can make it easier to solve.
Rewriting an exponential equation as a derivative can help isolate the exponential term.
Integrating both sides of the equation with respect to time can help solve for the variable.
Exponentiating both sides of the equation can help solve for the variable.

Frequently Asked Questions

Q: What is the purpose of replacing symbols in an exponential equation?

A: Replacing symbols in an exponential equation can make it easier to solve by simplifying the equation and isolating the exponential term.

Q: How do I rewrite an exponential equation as a derivative?

A: To rewrite an exponential equation as a derivative, you need to isolate the exponential term by dividing both sides of the equation by the variable.

Q: How do I integrate both sides of the equation with respect to time?

A: To integrate both sides of the equation with respect to time, you need to evaluate the integral of the left-hand side and the right-hand side separately.

Q: How do I solve for the variable?

A: To solve for the variable, you need to exponentiate both sides of the equation.

References

[1] "Exponential Equations" by Math Is Fun
[2] "Derivatives" by Khan Academy
[3] "Integrals" by MIT OpenCourseWare

Additional Resources

[1] "Exponential Growth" by Wolfram Alpha
[2] "Derivative Rules" by Purplemath
[3] "Integral Rules" by Mathway
Exponential Equations Q&A =============================

Frequently Asked Questions

Q: What is an exponential equation?

A: An exponential equation is a mathematical equation that involves an exponential function, which is a function of the form $f(x) = a^x$ , where $a$ is a positive constant and $x$ is the variable.

Q: How do I identify an exponential equation?

A: To identify an exponential equation, look for the presence of an exponential function, which is typically written in the form $a^x$ or $e^x$ , where $a$ is a positive constant and $x$ is the variable.

Q: What is the difference between an exponential equation and a linear equation?

A: The main difference between an exponential equation and a linear equation is the presence of an exponential function in the exponential equation. Exponential equations involve functions of the form $a^x$ , while linear equations involve functions of the form $mx + b$ , where $m$ is the slope and $b$ is the y-intercept.

Q: How do I solve an exponential equation?

A: To solve an exponential equation, you need to isolate the exponential term by dividing both sides of the equation by the variable. Then, you can use logarithms to solve for the variable.

Q: What is the role of logarithms in solving exponential equations?

A: Logarithms play a crucial role in solving exponential equations. By taking the logarithm of both sides of the equation, you can eliminate the exponential term and solve for the variable.

Q: How do I use logarithms to solve an exponential equation?

A: To use logarithms to solve an exponential equation, you need to take the logarithm of both sides of the equation. Then, you can use the properties of logarithms to simplify the equation and solve for the variable.

Q: What is the difference between a natural logarithm and a common logarithm?

A: The main difference between a natural logarithm and a common logarithm is the base of the logarithm. A natural logarithm has a base of $e$ , while a common logarithm has a base of 10.

Q: How do I choose between a natural logarithm and a common logarithm?

A: The choice between a natural logarithm and a common logarithm depends on the specific problem you are trying to solve. If the problem involves a base of $e$ , you should use a natural logarithm. If the problem involves a base of 10, you should use a common logarithm.

Q: What is the relationship between exponential equations and population growth?

A: Exponential equations are often used to model population growth, which is a classic example of exponential growth. The equation $N(t) = N_0 e^{rt}$ , where $N(t)$ is the population size at time $t$ , $N_0$ is the initial population size, $r$ is the growth rate, and $t$ is time, is a common example of an exponential equation used to model population growth.

Q: How do I use exponential equations to model population growth?

A: To use exponential equations to model population growth, you need to identify the variables involved in the problem, such as the population size, growth rate, and time. Then, you can use the equation $N(t) = N_0 e^{rt}$ to model the population growth.

Q: What are some real-world applications of exponential equations?

A: Exponential equations have many real-world applications, including modeling population growth, chemical reactions, and financial investments. They are also used in fields such as physics, engineering, and economics.

Conclusion

Exponential equations are a fundamental concept in mathematics, and they have many real-world applications. By understanding how to identify, solve, and use exponential equations, you can gain a deeper understanding of the underlying mathematics and apply it to a wide range of problems.

Key Takeaways

Exponential equations involve functions of the form $a^x$ or $e^x$ .
Logarithms play a crucial role in solving exponential equations.
The choice between a natural logarithm and a common logarithm depends on the specific problem.
Exponential equations are often used to model population growth and other real-world phenomena.

Frequently Asked Questions (FAQs)

Q: What is the difference between an exponential equation and a linear equation?

A: The main difference between an exponential equation and a linear equation is the presence of an exponential function in the exponential equation.

Q: How do I solve an exponential equation?

A: To solve an exponential equation, you need to isolate the exponential term by dividing both sides of the equation by the variable.

Q: What is the role of logarithms in solving exponential equations?

A: Logarithms play a crucial role in solving exponential equations by eliminating the exponential term.

References

[1] "Exponential Equations" by Math Is Fun
[2] "Logarithms" by Khan Academy
[3] "Exponential Growth" by Wolfram Alpha

Additional Resources

[1] "Exponential Equations" by Purplemath
[2] "Logarithmic Equations" by Mathway
[3] "Exponential Growth and Decay" by MIT OpenCourseWare