Complete the sentence below. If x 1 and x 2 are two different inputs of a function f, then f is one-to one if _______. Question content area bottom Part 1 If x 1 and x 2 are two different inputs of a function f, then f is one-to one if f left parenthesis x 1 right parenthesis not equals f left parenthesis x 2 right parenthesis . f left parenthesis x 1 right parenthesis equals f left parenthesis x 2 right parenthesis