Question

Need help with this problem, it's kinda obscure...

Find f inverse of c (f^-1(c)) for the given f and c by inspection:
f(x)=x^5+2x^3+2x+3, and c=3

Answer 1

Oh the problem actually says: Find f-inverse of c for the given f and c by inspection, that is, without trying to calculate f-inverse of x for a general value of x.

Answer 2

Well the f inverse of c will be the value of x that makes f(x) = c.

So the f inverse of 3 will be the value of x that makes f(x) = 3.

So what x can you plug in that will make x^5 + 2x^3 + 2x + 3 = 3?

Answer 3

Oh it'll be zero. Okay I understand now.

Answer 4

Thank you!