What is the value of the following sum? S = 12/21 + 22/22 + 32/23 + … + n2/2n + …
What is the value of 'k' in the following sum? 57 + 54 + 51 +..........+ k = -123
Find the value of the following sum:
A number (x) is 3 less than the thrice of other number (y) and sum of their squares is 97. What is the value of x and y respectively?