Another Derivative Question... - Topic

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Oct 7 2013 05:00pm

Differentiate:

okay, so i think you're supposed to change the equation to

(3x) (x^-2 + 2^-2)

and then use the Product Rule, but i'm not sure.

it's not working very well for me.

pls help :C

TritonV8

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Oct 7 2013 05:06pm

use the Quotient rule.

(Low-d-hi minus Hi-d-Low)/ Low squared:

[(x^2 + 4)(3) - (3x)(2x)] / (x^2 + 4)^2

(3x^2 + 12 - 6x^2) / (x^2 + 4)^2

i'll let you simplify

carteblanche

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Oct 7 2013 06:05pm

Quote (King-Punisher09 @ Oct 7 2013 07:00pm)

Differentiate:

http://i.imgur.com/QQedLiK.png

okay, so i think you're supposed to change the equation to

(3x) (x^-2 + 2^-2)

and then use the Product Rule, but i'm not sure.

it's not working very well for me.

pls help :C

i think that's an algebra fail right there.

(x^2+4)^-1 is not the same as (x^-2+2^-2).

otherwise, the product rule works fine.

King-Punisher09

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Gold: 410.78

Oct 7 2013 06:34pm

Quote (carteblanche @ Oct 8 2013 12:05am)

i think that's an algebra fail right there.

(x^2+4)^-1 is not the same as (x^-2+2^-2).

otherwise, the product rule works fine.

oh shieeeeet.

thanks man xD

Azrad

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