Q74. If a, b, and c are in Harmonic Progression (H.P.), then what is the value of (1/a + 1/b - 1/c)(1/b + 1/c - 1/a)?Mathematics — NUST Mock 6 — Question 74 of 200A. 4/ac - 3/b2B. ac/4 - b2/3C. acb/(4 - c2)D. 1/ab - 4/acPractice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →