If `(5+9+13+..."upto n terms")/(7+9+11+..."upto 12 terms")=(5)/(12)`, then n is equal to

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

If (1 + 3 + 5 + .... " upto n terms ")/(4 + 7 + 10 + ... " upto n terms") = (20)/(7 " log"_(10)x) and n = log_(10)x + log_(10) x^((1)/(2)) + log_(10) x^((1)/(4)) + log_(10) x^((1)/(8)) + ... + oo , then x is equal to

If (3+5+7+... upto n terms )/(5+8+113... upto 10 terms )=7, then find the value of n.

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

if (3 +5+7+9+…. " up to 35 terms " )/(5+8+11+ …. " up to n terms ")=7 , find the value of n.

If (1xx3 + 2xx5 + 3xx7 + ….. upto n terms) / ( 1^3 + 2^3 + 3^3 + …… upto n terms) = 5/9, find the value of n.

If a=1+2+4+ . . . . upto n terms b=1+3+9+. . . . upto n terms c=1+5+25+. . . . upto n terms then Delta= |[a,2b,4 c],[2,2,2],[2^n,3^n,5^n]|=

If S_(n) = 1 + 3 + 7 + 13 + 21 + "….." upto n terms, then