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Thread: definite integral question

  1. March 10th 2009, 10:17 AM #1
    champrock
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    definite integral question

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  2. March 10th 2009, 11:03 AM #2
    HallsofIvy
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    Quote Originally Posted by champrock View Post
    The graph of y= \frac{3}{4}- x- x^2 is a parabola opening downward. Also \frac{3}{4}- x- x^2= \frac{-1}{4}(4x^2+ 4x- 3)= \frac{-1}{4}(2x- 3)(2x+ 1)= 0 when x= 3/2 or -1/2. If a and b are both between -1/2 and 3/2, then the integral from a to b is less than the integral from -1/2 to 3/2. If either or both is outside that interval, you will be subtracting from that.
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