Find the sum of `2n` terms of the series whose every even term is `' a '` times the term before it and every odd term is `' c '` times the term before it, the first term being unity.

The sum of 2n terms of a series of which every even term is a times the term before it, and every odd term is c times the term before it, the first term being unity is

The sum of 20 terms of a series of which every term is 2 times the term before it ,and every odd term is 3 times the term before it the first term being unity is

The sum of 20 terms of a series of which every term is 2 times the term before it ,and every odd term is 3 times the term before it the first term being unity is

If every even term of a series is a times the term before it and every odd term is c times the before it, the first term being unity, then the sum to 2n terms is

The sum of 20 terms of a series of which every even term is 2 times the term before it, every odd term is 3 times the term before it, the first term being unity is a. (2/7)(6^(10)-1) b. (3/7)(6^(10)-1) c. (3/5)(6^(10)-1) d. none of these

The sum of 20 terms of a series of which every even term is 2 times the term before it, every odd term is 3 times the term before it, the first term being unity is a. (2/7)(6^(10)-1) b. (3/7)(6^(10)-1) c. (3/5)(6^(10)-1) d. none of these

20.Find the sum of 2n terms of a series of which every even term is a xx the term before it,and every odd term c xx the term before it,the first term being unity

Find the sum of first n terms of the series whose nth term is 3n^(2)+5 .

The sum of 20 terms of a series of which every even term is 2 xx the term before it,every odd term is 3 xx the term before it,the first tem being unity is ((2)/(7))(6^(10)-1) b.((3)/(7))(6^(10)-1) c.((3)/(5))(6^(10)-1) d.none of these