Question

find derivative:
y=(9x+4)^x

Answer 1

can u tell me in which form is it? @hardequalsmath

Answer 2

what do you mean? i know that you start by taking ln to both sides

Answer 3

listen do u know composite derivates

Answer 4

i dont think so...

Answer 5

it is in the form a^x?

Answer 6

@hardequalsmath

Answer 7

no its not the definition formula

Answer 8

y=a^xloga

Answer 9

x^x?

Answer 10

ok so i know that you start by doing lny=x*ln(9x+4) then take derivative

Answer 11

no

Answer 12

follow the third formula and than again derivative (9x+4)

Answer 13

praxer is correct @hardequalsmath

Answer 14

isnt that what i did?

Answer 15

yes but u did not mention the derivate of (9x+7)

Answer 16

cause i didnt take the derivative yet...i was just showing how to set it up

Answer 17

ok sorry

Answer 18

so then i got y1/y=ln(9x+4)+9x/(9x+4) then what?

Answer 19

@praxer will u plz... check?

Answer 20

i suppose on the left side it should be y'/y cause y*1/y shall yield to 1..Right ?

Answer 21

yes

Answer 22

Than it is correct. but since you are asked with the y' so keep the y' value on the left and get the final equation. :)

Answer 23

thanks