6. The function f(x) = (x+8)²-1 is not one-to-one. Identify a restricted domain that makes the
function one-to-one, and find the inverse function.
O restricted domain: x≤-8: f¹(x) = -8+√√x-1
O restricted domain: x2-8; f¹(x) = -8-√√x+1
O restricted domain: x≤-8; f(x) = -8+√x+1
O restricted domain: x2-8: f'(x) = -8+√√x+1