# calculus

posted by
**k** on
.

f(x)= 3x^7 +2x -9

If g(x)= f inverse of x

and g(-4)= 1,

what is g'(-4)?

I know that f inverse is the same as

1/f'(x) but I'm not sure where to go from there.

posted by
**k** on
.

f(x)= 3x^7 +2x -9

If g(x)= f inverse of x

and g(-4)= 1,

what is g'(-4)?

I know that f inverse is the same as

1/f'(x) but I'm not sure where to go from there.