Question

y'' for y= (x^2+9)^4

Answer 1

\[8(x^2+9)^3+48x(x^2+9)^2\]

Answer 2

awesome thank you

Answer 3

could you show me y' for this so i can see how you got y''

Answer 4

\[8x(x^2+9)^3\]

Answer 5

thank you

Answer 6

No Problem

Answer 7

could you help me on another?

Answer 8

Sure

Answer 9

y'' for y= ln x/x^2

Answer 10

I am horrible when it come to ln in problems

Answer 11

\[-3x^(-4)+6lnx(x^(-4))+4x^(-4)\]

Answer 12

ooops

Answer 13

ha ha ha

Answer 14

-3x^(-4)+6x^(-4)lnx+4x^(-4)

Answer 15

could you show me how to do this?

Answer 16

\[y=lnx(x^{-2})\] Then you use product rule

Answer 17

okay..so then thats how you got the final answer

Answer 18

y' = x^(-3)-2x^(-3)lnx

Answer 19

and then you differentiate it again? do u know how to do that?

Answer 20

yes then you get....

Answer 21

-3x^(-4)+6x^(-4)lnx+4x^(-4)

Answer 22

-3x^-4 + 6x^-4 lnx ?

Answer 23

remember to use product rule for x^(-3)lnx

Answer 24

where are you getting the last part?

Answer 25

you forgot to use product rule for lnx(x^(-3))

Answer 26

oh okay now im with you. thanks

Answer 27

welcome