If `t_r` denotes the `nth` term of an G.P and `t_1t_5 t_10t_16t_21t_25 = 512,` then the value of its `13th` term is:

If t_r denotes the r^(th) term of an G.P. and t_1 t_5 t_10 t_16 t_21 t_25 = 512 , then the value of its 13^(th) term is :

If t_r denotes the r^(th) term of an G.P. and t_1 t_5 t_10 t_16 t_21 t_25 = 512 , then the value of its 13^(th) term is :

If t_r denotes the r^(th) term of an A.P. and t_1+ t_5 + t_10 + T_15 + t_20 + t_24 = 75 , then sum of its first 24 terms is :

If t_r denotes the r^(th) term of an A.P. and t_1+ t_5 + t_10 + T_15 + t_20 + t_24 = 75 , then sum of its first 24 terms is :

A sequence is defined as: t_(n+1)=t_(n)-t_(n-1) , where t_(n) denotes the n^(th) term of the sequence. If t_(1) =1 and t_(2)=5 , find the sum of the first 100 terms of the above sequence.

If t_n denotes the nth term of the series 2+3+6+11+18+….. Then t_50 is

If t_n denotes the nth term of the series 2+3+6+11+18+….. Then t_50 is

If t_n denotes the nth term of the series 2+3+6+11+18+….. Then t_50 is

If it,be the n^(th) term of an A.P and if t_(7)=9 then the value of the c.d.that would make t_(1)t_(2)t_(7), least is