Question

find the equation of the tangent at x=2 at the following function:
f(x)= (4x^3)/(1-4x)^5

Answer 1

can u differentiate f(x) ?

Answer 2

yeah wait

Answer 3

4x^2(8x+3)/(1-4x)^6

Answer 4

u using quotient rule, right ?
plz, verify it again, thats not right...

Answer 5

i used wolfram alpha you can use it, but i cant find the equation :/

Answer 6

http://www.wolframalpha.com/input/?i=differentiate++%284x%5E3%29%2F%281-4x%29%5E5

Answer 7

now put x= 2 int that equation,
you will get the slope of line

Answer 8

put x= 2 in f(x) also
so u get a point on that curve(x,y)
then the equation of line is :
(y-y1)=m(x-x1)

Answer 9

point(x1,y1)*

Answer 10

okay ill try that too but ive been putting x=2 in the equation you sent but im not getting the answer thanks anyways!