Math Problem Statement

Let f(x) = 5^x. Use a small interval to estimate f'(2). Round your answer to two decimal places.

Solution

To estimate f(2)f'(2), we can use the definition of the derivative as a limit:

f(x)f(x+h)f(x)hf'(x) \approx \frac{f(x+h) - f(x)}{h}

For this problem, we'll estimate f(2)f'(2) using a small value for hh, which is often something like 0.01 or 0.001. Let's use h=0.001h = 0.001 to get a good approximation.

Given f(x)=5xf(x) = 5^x, we need to calculate the following:

f(2)f(2+0.001)f(2)0.001f'(2) \approx \frac{f(2 + 0.001) - f(2)}{0.001}

First, calculate f(2)f(2) and f(2+0.001)f(2 + 0.001):

f(2)=52=25f(2) = 5^2 = 25 f(2+0.001)=52.001f(2 + 0.001) = 5^{2.001}

I'll now calculate 52.0015^{2.001} and then approximate the derivative.Using h=0.001h = 0.001, we estimate that:

f(2)40.27f'(2) \approx 40.27

This is the approximation for the derivative of f(x)=5xf(x) = 5^x at x=2x = 2, rounded to two decimal places.

Would you like more details or further explanation? Here are five related questions to explore:

  1. How does the value of hh affect the accuracy of the derivative estimate?
  2. What is the exact derivative of f(x)=5xf(x) = 5^x?
  3. How can we estimate derivatives for more complicated functions?
  4. Can we estimate higher-order derivatives using similar methods?
  5. What are some common applications of derivatives in real-world problems?

Tip: When estimating derivatives numerically, using a smaller hh generally improves accuracy but may lead to rounding errors in calculations.

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Math Problem Analysis

Mathematical Concepts

Derivative
Exponential Functions
Numerical Approximation

Formulas

f'(x) ≈ (f(x + h) - f(x)) / h
f(x) = 5^x

Theorems

Definition of the derivative

Suitable Grade Level

Grades 10-12