If `S=(a)/(1-r^(3))`, then expres r in terms of S and a.

If t=(1)/(r)+(1)/(s) , then what is (1)/(t) in terms of r and s?

If s = t + sqrt((r^(3))/(q)) , what is the value of r in terms of q, s and t ?

If S_(r) denotes the sum of the first r terms of an A.P.then show that (S_(3r)-S_(r-1))/(S_(2r)-S_(2r-1)) is equals

If 2r=s and 24t=3s , what is the r in terms of t?

If S_r denotes the sum of the first r terms of an A.P. Then, S_(3n)\ :(S_(2n)-S_n) is n (b) 3n (c) 3 (d) none of these

If S_r denotes the sum of the first r terms of an A.P. Then, S_(3n)\ :(S_(2n)-S_n) is n (b) 3n (c) 3 (d) none of these

(11+s)/(12r)=(1)/(6)+(1-3s)/(4r) In the equation above, what is r inn terms of s?

If S_(n) denotes the sum fo n terms of a G.P. whose first term and common ratio are a and r respectively then show that: S_(1)+S_(3)+S_(5)+……..+S_(2n)-1=(an)/(1-r)-(ar(1-r^(2n)))/((1-r^(2))