`2 + 4 + 7 + 11 + 16 +`.... to `n` term =

2+ 4+ 7 + 11 + 16 + ….. upto n terms is equal to

Prove the following by the method of induction for all n in N : 3 + 7+ 11 +.. to n terms = n(2n + 1).

1/2+3/4+7/8+15/16+..... t o n terms =

If S_1 = 3, 7, 11 15, … upto 125 terms and S_2 = 4, 7, 10, 13, 16, … upto 125 terms the how many terms are there in S_1 that are there in S_2 ?

16 + 11 + 6 + ……….23 terms = …….

If (5+9+13+...... n terms)/( 7 + 9 + 11 +....(n+1) terms) = 17/16 , then n=

If (5 + 9 + 13 + .... rarr nterms) / (7 + 9 + 11 + ... rarr (n + 1) terms) = (17) / (16), then n =

If S_n = (1)/(6.11) + (1)/(11.16) + (1)/(16.21) + …. to n terms then 6S_n equals

Find 1.4.7 + 3.6.9 + 5.8.11 + 7.10.13 …. Upto 'n' term.