Question

Find y '' by implicit differentiation
9x^2 + y^2 = 9....i got y '...idk how to find y''

Answer 1

I got that y ' = -9x /y
but how do u find y''?

Answer 2

differentiate again, using quotient rule

Answer 3

u=-9x
du/dx= -9
v= y
dv/dx = dy/dx = y'

Answer 4

Please check my working before use

Answer 5

im confused what u are doing to get y '' thou

Answer 6

liek what rule or formula are u using

Answer 7

so \[y'' = \frac{-9y - ( -9x)(y') }{y^2}\]

Answer 8

then sub in y' = -9x/y

Answer 9

wait how did u get what y '' is ....like how is it -9y - (-9x) etc....

Answer 10

quotient rule.

Answer 11

so what shud the final answer be