Let Sn denote the sum of the cubes of first n natural numbers, and sn denote the sum of first n natural numbers. Then write the value of
To find
Let I = …… (1)
Given,
Substituting in equation (1)
We know by property that:
∑axn + bxn - 1 + cxn - 2…….d0=a∑xn + b∑xn - 1 + c∑xn - 2…….. + d0∑1
Thus
And We know
Substituting the values