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January 30, 2015

January 30, 2015

Posted by **Si** on Friday, April 9, 2010 at 3:47pm.

By the Mean Value Theorem, we know there exists at least one c in the open interval ( -6 , 10 ) such that f'( c) is equal to this mean slope.

::>> I already found the mean slope of the function which is 38. Now I'm trying to find "c". I can't get c.

- Calculus -
**Damon**, Friday, April 9, 2010 at 4:18pm6x^2 - 12 x -90 = 38 ??? assuming your 38 is correct

6 x^2 - 12 x - 128 = 0

3x^2 - 6 x - 64 = 0

x =5.73

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