Question

Let a,b be positive real numbers. lf a, A1, A2, b are in arithmetic progression, a, G1, G2, b are in geometric progression and a,H1,H2, b arc in harmonic progression. show that (G1G2)/(H1H2) = (A1 + A2)/(H1 + H2) = ((2a + b)(a + 2b))/9ab

Answer 1

Since, a, A1, A2, b are in AP