Let g(x)=logf(x) where f(x) is a twice differentiable positive function on 0,∞ such that f(x+1)=xf(x) . Then, for N=1,2,3,.....g′′ (N+12)−g′′(12)=
(1+31)(1+54)(1+79)⋯(1+(2n+1)n2)=(n+1)2
Prove the following by using the principle of mathematical induction for all n ∈ N: