Question

Check my answer? (derivatives)

Answer 1

\[y=\frac{ x+1 }{ x ^{3} +x-2}\]

Answer 2

i got \[\frac{ -5x ^{3} -3}{(x ^{3}+x-2)^{2} }\]

Answer 3

ciy
http://www.wolframalpha.com/input/?i=y%3D \frac{+x%2B1+}{+x+^{3}+%2Bx-2}

Answer 4

thats a 5x^3 i couldnt figure out how to make the test larger :(

Answer 5

x^3 as well in the equation and my answer

Answer 6

I know wolfram can answer it but they have it in a different form than how i solve it

Answer 7

or better still
http://www.wolframalpha.com/input/?i=%28x%2B1+%29%2F%28+x+^3+%2Bx-2%29

Answer 8

if you got something other than wolf's answer, it is a mistake

Answer 9

Actually, no. there is several ways to write it.

Answer 10

can you show how you got that numerator ?
we'll help you spot the error.

Answer 11

not really

Answer 12

you can distribute the minus sign, but not much else

Answer 13

I believe it is correct? looking at wolfram they just didnt foil the negative

Answer 14

apparantely, there is some mistake somewhere in your work...

Answer 15

I dont think there is...

Answer 16

I got -(2x^3+3x^2+3) in the numerator.

Answer 17

can you please post how you got it ? and let us verify ?

Answer 18

In the denominator I just got the denominator of the original fraction squared.

Answer 19

that was what i got lol

Answer 20

\[gf'-f'g\] is the numerator with \(f(x)=x+1,f'(x)=1,g(x)=x^3+x-3,g'(x)=3x^2+1\)

Answer 21

-5x^3-3/(x^3+x-2)^2

Answer 22

Wolfram didnt foil the negative.

Answer 23

Thats why its different

Answer 24

derivative of top times the bottom is just x^3+x-2

derivative of the bottom times the top is (3x^2+1)(x+1)

Answer 25

...

Answer 26

\[(x^3+x-3)\times 1-(3x^2+1)(x+1)\]

Answer 27

that is the algebra you need.
not exactly sure what "foil the negative" means

Answer 28

lol.

Answer 29

I am not processing math curently so I am typing all this long hand as opposed too using the equation editor.

Answer 30

its alright, i got it.

Answer 31

I am sure he meant distribute.

Answer 32

I did. calmat. :)

Answer 33

got my algebra terms mixed in somehow

Answer 34

LOL!

Answer 35

somewhere on your computer you have that saved