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∑r=1nSrsr.

Let Sn denote the sum of the cubes of first n natural numbers and sn d

1.	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∑r=1nSrsr.
Answer» Let S_n denote the sum of the cubes of first n natural numbers and s_n denote the sum of first n natural numbers. Then, write the value of $\sum_{r = 1}^{n} \frac{S_{r}}{s_{r}}$ .