Question #328944

Is the following statement true or false. Give an explanation and an example of your answer.


if f' is continuous on [1, 3], then the integral which goes from 1 to 3 f(v)d(v)=f(3)f(1)f' (v) d(v) = f(3) - f(1) ?


1
Expert's answer
2022-04-18T00:18:39-0400

This statement is true, according to the fundamental theorem of calculus.

Let f(x)=2x2f(x) = 2x^2. Then f(x)=4xf'(x) = 4x. Then the integral is:


13f(x)dx=f(3)f(1)=232212=16\int_1^3 f'(x)dx = f(3)-f(1) = 2\cdot 3^2 - 2\cdot 1^2 =16

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