Mathematics

Mathematics

Problem

A student claims that F(x)=1xF(x)=\dfrac{1}{x} is an antiderivative of f(x)=1x2f(x)=\dfrac{1}{x^{2}}. Show whether the claim is correct. If it is incorrect, write the correct antiderivative, including the constant of integration.
Intuitive explanation

The key is to test the claim by differentiating—if F(x)F(x) is truly an antiderivative of f(x)f(x), then F′(x)F'(x) must equal f(x)f(x). Use the power rule or quotient rule to find the derivative of 1x\frac{1}{x} and compare it to 1x2\frac{1}{x^2}. If they don't match, you'll need to adjust F(x)F(x) and verify your correction by differentiating again.

Intuitive explanation

The key is to test the claim by differentiating—if F(x)F(x) is truly an antiderivative of f(x)f(x), then F′(x)F'(x) must equal f(x)f(x). Use the power rule or quotient rule to find the derivative of 1x\frac{1}{x} and compare it to 1x2\frac{1}{x^2}. If they don't match, you'll need to adjust F(x)F(x) and verify your correction by differentiating again.

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