(adsbygoogle = window.adsbygoogle || []).push({}); 1)Use differentials to estimate f(8.05) given that f(8)=71 and

(d/dx)f(x)=sqrt of (x+56)

i used f(c+h) = f(c) + fprime(c) * h

i got 8.125, but the answer is 71.40

2)Compute dy/dx at the given values xy - 6y^2 - 2x = -24 , x=1, y=2

I keep getting 4/25

but the answer is 0

3)Give a value c that satisfies the conclusion of the mean value theorem on the interval 2 < x < 5 for the function f(x) = 6x^2 + 8x + 13 (note: all < means greater than or equal to)

I took the prime of f(x), and f '(c) = 12x + 8

12x + 8 = 5

and I got c= (-1/4)

but the answer is c = (7/4)

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# Homework Help: Calculus Help

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