The function ƒ(x) = x2 − 9 is not one-to-one. Find a portion of the domain where the function is one-to-one and find an inverse function.

What is the sum of the geometric series in which a1 = 7, r = 3, and an = 1,701? hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1, where a1 is the first term and r is the common ratio