The `7th` term of the series `1,-1/2,1/4,....` is

The next term of the series 1, 2, 4, 8, .... is:

Find the 7th term of the series -1/8 +1/4 - 1/2 + 1 … :

Find the 150 th term of the series 1,2,2,3,3,3,4,4,4,4,...

Sum of the first 18 terms of the series 1+4+7+......

Sum of the first 18 terms of the series 1+4+7+......

Let T_(n)=(an^(2)+bn+c)2^(an^(2)+bn) be the n^(th) term of the series 1+2.2^(1)+4.2^(3)+7.2^(6)+.... then

7th term of the sequence 1,3,9,23,53,115 is

The 15 th term of the series 2(1)/(2)+1(7)/(13)+1(1)/(9)+(20)/(23)+...is(10)/(39) b.(10)/(21) c.(10)/(23) d.none of these