(1) find the sum of

(i) Find the sum of first 200 even natural numbers. (ii) Find the sum of all numbers lying between 201 and 424 which are divisible by 5. (iii) Find the sum of all numbers from 1 to 200 which are divisible by either 2 or 3.

In the expansion of (1+x)^(50), find the sum of coefficients of odd powers of xdot

In the expansion of (1+x)^(50), find the sum of coefficients of odd powers of x .

Find the sum Sigma_(r=1)^(n) r/((r+1)!) . Also, find the sum of infinite terms.

The sum of two numbers is 9 and their product is 20. Find the sum of their: squares

The sum of two numbers is 9 and their product is 20. Find the sum of their: cubes

If the sum of two numbers is 5 and the sum of their cubes is 35, find the sum of their squares

The sum of two numbers is 7 and the sum of their cubes is 133. Find the sum of their squares

find the sum of coefficient in (x+y)^(8) .

Find the sum of 654, 392 and 108.