Tuesday

September 30, 2014

September 30, 2014

Posted by **Brian** on Thursday, January 18, 2007 at 1:43pm.

on the given interval. Then find all numbers c that satisfy the conclusiton

of Rolle's Theorem. f(x)= x*sqrt(x+6) [-6,0]

f is continuous and differential

f(-6) =-6*sqrt(-6+6) =0

f(0)=0

f(x) = x (x+6^1/2)

f'(x)= (x+6^1/2) + (1/2x +6)^1/2

0=(x+6^1/2) + (1/2x +6)^1/2

x=-2.918

I don't think this is correct so could you please tell me what I did wrong?

Thanks.

f(x)= x*sqrt(x+6)--->

f'(x) = sqrt(x+6) + x/[2sqrt(x+6)]

f'(x) = 0 --->

x = -4

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