Question

given f(x)=x^2-x-2
find: f^-1(x)

Answer 1

@ranga

Answer 2

@Lena772

Answer 3

plz help

Answer 4

@UsukiDoll

Answer 5

can you please be more specific? is it the derivative? what subject is this?

Answer 6

I think there is more than one problem that involves this.. either you have to graph f(x) and take the derivative of the graph... or take the inverse derivative.. I can't tell by these things alone

Answer 7

i just want inverse function

Answer 8

@ranga

Answer 9

To find the inverse function, the original function has to be a one-to-one function. That is, it should pass the horizontal line test.
f(x)=x^2-x-2 is a vertical parabola and so a horizontal line will cross the graph at 2 points and therefore it fails the horizontal line test and it is NOT a one-to-one function. The inverse is not defined or does not exist for this function.

Answer 10

thanks a lot @ranga