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#1 2008-11-23 20:45:33
- Angel Rox
- Member
- Registered: 2008-11-10
- Posts: 15
Help me out with this .... its really urgent
If f(4)=3 & f'(4)=-5, find g'(4). where g(x) = √x f(x)?
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#2 2008-11-23 21:26:28
- mathsyperson
- Moderator
- Registered: 2005-06-22
- Posts: 4,900
Re: Help me out with this .... its really urgent
Using the product rule, g'(x) = √x f'(x) + (1/2√x)f(x).
∴ g'(4) = 2*-5 + (1/4)*3 = -9 1/4
Why did the vector cross the road?
It wanted to be normal.
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#3 2008-11-23 21:44:08
- Angel Rox
- Member
- Registered: 2008-11-10
- Posts: 15
Re: Help me out with this .... its really urgent
Thanks .. Thanks Alot
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