Originally Posted by

**delgeezee** I need help.

I want to use the quotient rule to find $\displaystyle \frac{d}{dx}[\frac{3t^1^6-4}{t^6}]$

So I do

$\displaystyle \frac{t^6(\frac{d}{dx}[3t^1^6-4]) - (3t^1^6-4)(\frac{d}{dx}[t^6])}{(t^6)^2}$

=$\displaystyle \frac{t^6(48t^1^5) - (3t^1^6-4)(6t^5)}{t^1^2}$

=$\displaystyle \frac{48t^2^1-18t^2^1-24t^5}{t^1^2}$

=$\displaystyle \frac{30^2^1-24t^5}{t^1^2}$

=$\displaystyle 30^9-24t^-^7$

but the answer in the book is

=$\displaystyle 30^9+24t^-^7$

What Am I doing wrong?