Can someone check Quotient rule and Product rule problem?

[killasnake]

Hi I'm not sure if I did this correctly.

The Quotient Rule

$\displaystyle (sin x)/(x^2-1)$

answer: $\displaystyle (x^2-1)(cos x) - (sin x)(2x)/(x^2-1)^2$

This that my answer?

-----------------------------------------------

The Product Rule

$\displaystyle (sin x)(x^2-1)$

answer: $\displaystyle (sin x)(2x) + (cos x)(x^2-1)$

 

[stapel]

Are you supposed to be finding derivatives of the posted expressions? (No instructions were included, nor any steps shown, is why I ask.)

Thank you.

Eliz.

 

[tkhunny]

Re: Can someone check Quotient rule and Product rule problem

(x^2-1)(cos x) - (sin x)(2x)/(x^2-1)^2

Bad notation. Try this:

[(x^2-1)(cos x) - (sin x)(2x)]/(x^2-1)^2

 

[killasnake]

Are you supposed to be finding derivatives of the posted expressions? (No instructions were included, nor any steps shown, is why I ask.)

Thank you.

Eliz.

Sorry yes it was to find the derivatives, but I got the correct answers now. bad notation effects the answer.