[" 2.If "((a)-5b)/(5+8+11+cdots+10" terms ")=7" the value of "n" is "],[[" (b) "36," (c) "37," (d) "40]]

If (3+5+7+ . . . .+"n terms")/(5+8+11+ . . .. +"10 terms")=7 , then the value of n, is

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

if (3+5+7...n terms)/(5+8+11+...10 terms)=7 find n.

Find the 10th term of the sequence 2x,5x^(3) , 8x^(5), 11x^(7), …

Find the sum of the 10 terms of the following series -11, -8, -5, -2…….

The mean of 7,5,8,p and 11 is 8. Find the value of p.

Let A, be the sum of the first n terms of the geometric series 704 + (704)/(2) +(704)/(4) +(704)/(8)+ cdots and B_(n) , be the sum of the first n terms of the geometric series 1984 - (1984)/(2) + (1984)/(4) -(1984)/(8) + cdots If A_(n), =B_(n) , then the value of n is (where n in N).

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

If 2(2n+5)=3\ (3n-10), then n= (a)5 (b) 3 (c)7 (d) 8