Is that or ?
Let f(x)= 3√x+2 and g(x)= x^3-2
Which of the following are true?
a. g(x)=f^-1(x) for all real values of x
b. (f o g)(x)=1 for all real values of x
c. The function f is one-to-one.
I think the answer is only c is true. Am I correct?