Excercise 13B

### Find the sum of 10 terms of the geometric series

### Find the sum of the series {2^2 + 4^2 + 6^2 + …. + (2n)^2}

### prove that

### prove that

### Find the sum 6^3 + 7^3 + 9^3 + 10^3.

### Find the sum 112 + 122 + 132+ …202

### Find the sum (41 + 42 + 43 + …. + 100).

Answer : It is required to find the sum (41 + 42 + 43 + …. + 100). (41 + 42 + 43 + …. + 100) = Sum of integers starting from 1 to 100 – Sum of integers starting from 1 to 40. Note: Sum of first n...

### Find the sum (2 + 4 + 6 + 8 +… + 100).

Answer : It is required to find the sum of (2 + 4 + 6 + 8 +… 100).