For any series 5+7+9+...the sum of how many terms will be 480?

For two A.P.: 2, 5, 8,…..up to 50 terms and 3, 5, 7, 9,….., up to 60 terms. How many terms are same?

The sum of the series 1-3+5-7+9-11+ . . . . To n terms is

The sum of the series 1-3+5-7+9-11+ . . . . To n terms is

Of how many terms is , (55)/(72) the sum of the series (2)/(9) -(1)/(3)+(1)/(2)- .... ?

The sum of how many terms of the series 6+12+18+24+... is 1800?

Find the sum of first n terms and the sum of first 5 terms of the geometric series 1+2/3+4/9+......

Find the sum of first n terms and the sum of first 5 terms of the geometric series 1+ 2/3 +4/9 +............

Find the sum of first n terms and the sum of first 5 terms of the geometric series 1+ 2/3 +4/9 +............

Find the sum of first n terms and the sum of first 5 terms of the geometric series 1+ 2/3 +4/9 +............