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Answer the following True or False. If f(x) is a positive 1−1 function, then 2π∫

a
b

xf(x)dx=2π∫
a
b

(b−x)f(x)
A. True
B. False

User Wgraham
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1 Answer

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Final answer:

The statement is generally false because it assumes symmetry that isn't guaranteed by being a positive 1-1 function. Without knowing the symmetry of the function or the limits of integration, we cannot assure the integrals of xf(x) and (b-x)f(x) are equal.

Step-by-step explanation:

The question asks to evaluate the truth of a statement regarding integrals of a positive 1-1 function. To determine if the statement 'If f(x) is a positive 1−1 function, then π2π∫ab​ xf(x)dx=π2π∫ab​ (b-x)f(x)' is true or false, consider that for a 1-1 function, each x-value corresponds to a unique y-value and vice versa.

However, this statement about the integrals is generally false because without further information about the limits of integration or the symmetry of the function about the y-axis, we cannot guarantee the integral of xf(x) and the integral of (b-x)f(x) are the same.

When a function produces an odd function, such as xe-x² (odd times even is odd), it's true that the integral over all space of an odd function is zero. This is because the total area of the function above the x-axis cancels with the negative area below it. However, we cannot apply this property here without knowing if the integrand is an odd function.

User Jakob Svenningsson
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