It can never equal to a what number ?

Explain why the function is discontinuous at the given number a. (select all that apply.) f(x) = 1 x + 1 a = −1 f(−1) is undefined. lim x→−1+ f(x) and lim x→−1− f(x) exist, but are not equal. lim x→−1 f(x) does not exist. f(−1) and lim x→−1 f(x) exist, but are not equal. none of the above

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Find the missing factor. write your answer inexponential form.9^2=9^4×