Q22. If f(x) = 3/(x − 1) for x ≠ 1, then for what value(s) of x is f(f(x)) undefined?Mathematics — NUST Mock 6 — Question 22 of 200A. 1, 4B. 1, 2C. 1D. 4Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →