Finding Values for Mean Value Theorem in Integrals

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The discussion centers on applying the Mean Value Theorem for Integrals to the function f(x) = x - 2√x over the interval [0, 2]. The user initially computes the integral and sets up the equation f(c)(2-0) = 2 - 8√2/3 but struggles to find the correct values for c. A suggestion is made to substitute u = √c to form a quadratic equation, which may simplify the solution process. The user expresses gratitude for the hint and feels more confident about proceeding. The conversation highlights the importance of correctly applying the theorem and transforming the equation for easier solving.
vee123
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I'm having a some difficulty with this problem:

Fidn the value(s) of c guaranteed by the Mean Value Theorem for Integrals for the function over the indicated interval:

f(x)=x - 2(square root of x) Interval: [0,2]

I found the integral to be: x^2/2 - 4/3 x^3/2, then I solved for the interval and got 2- 8(square root of 2)/3
then I did this:
f(c)(2-0)= 2- 8(square root of 2)/3

I just want to know if I am doing this correctly because I can't seem to get the right answers (0.4380,1.7908)
 
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your methods are correct so far.

you should have an equation that involves c and \sqrt{c}

hint: to solve this equation form the quadratic equation in u, by substituting u = \sqrt{c}

-MS
 
Last edited:
Thanks! I think I know what to do now. I really appreciate it!
 
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