Question

If 4 x^2+ 4 x + xy = 4 and y( 4 ) = -19, find y'( 4 ) by implicit differentiation.

Answer 1

i've found the derivative but im having problem with solving it

derivative = 8x+4+y+xy'

Answer 2

@wio

Answer 3

Well it is equal to 0

Answer 4

i know.. is the derivative right?

Answer 5

y' = (8x+4+y)/-x

Answer 6

Now let \(x=4,y=-19\)

Answer 7

ooh okay, i didn't know what the y was.. thanks

Answer 8

@ wio im stuck on this problem (y/(x-9y)=6x^2-4) find the slope of the tangent line to the curve using implicit differentiation
the points (1,-3/-26)

Answer 9

@wio

Answer 10

@satellite73