Name ______________________________ math/precalc/questb/pcfxinv.htm   © '02, A2
pcfxinv & pcfxINV.
1st: Graph f(x), f(x) =
2nd: Graph the inverse of f(x), f-1 =
3rd: Explain in words, why GRAPHICALLY one is the inverse of the other.
4th: Begin with f(x) and ALGEBRAICALLY derive the inverse, f-1.
pcfxINV: Prove algebraically that f(x) and f -1(x) are inverses by showing:
f(f -1(x)) = f -1(f(x)) = x.
coord plane