Question

Which function is the inverse of f(x)=50,000(0.8)^x?

a. f^-1(x)=log0.8(x/20,000)
b. f^-1(x)=log50,000(x/0.8)
c. f^-1(x)=log0.8(50,000/x)
d. f^-1(x)=log0.8(x/50,000)

P.S. There's more points if you answer this same question. I posted it three days ago.

Answer 1

inverse means the opposite. it's a bit confusing..I believe it's either C or D.