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cmjones8547

Member

Registered: 2010-02-28

Posts: 1

Differentiate

3.1.12 differentiate y=(x+6)/(5x+1)^2

3.1.23 differentiate y=1/((radical x) +7)

3.1.31 find x values where tang line is horizontal
y= (x-8)^5/(x-6)^6

find value of t where changing at rate of -12 facts/hr (psychology one)
y=95t/(99t-95)

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Differentiate

Hi cmjones8547;

3)

If I understand your question right you are looking for the tangent line that has a slope of 0.

You set that to 0 and solve:

There are four roots of x = 8 (remember that so we can deflate them out)

x = 18

So we have 5 roots x = {8,8,8,8,18} the x's where the tangent line has slope 0 are x = 18 , x = 8.

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

soroban

Member

Registered: 2007-03-09

Posts: 452

Re: Differentiate

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