f(x) is differentiable twice, show that
f′′(x) = lim f(x+2h)−2f(x+h)+f(x)
h→0
f(x) is differentiable twice, show that
f′′(x) = lim f(x+2h)−2f(x+h)+f(x)
h→0
The ages of Rahul and Haroon are in the ratio 5:7.four years later the sum of their ages will be 56 years.what are their present ages?