Question

If f(x) = x^5 + x^3 +x find f-1 (3)
how do I find the inverse function? I know its switching the x and y but how do I isolate y after?

Answer 1

The inverse function is a function such that if f(a)=b then f-1(b)=a.

Answer 2

So solve x^5+x^3+x=3, and you'll have your answer.

Here it is solved:
x^5+x^3+x-3=0
(x-1)(x^4+x^3+2x^2+2x+3)-0
x=1

Answer 3

thus f-1(3)=1

Answer 4

is the (x-1) a factor?