Q11 of 167 Page 20

If the sum of n terms of two A.P.’s are in the ratio (3n + 2) : (2n + 3), find the ratio of their 12th terms.

Here,



_____(1)


Now,we want to find ratio of 12th term,


i.e.


___(2)


From (1) and (2)we get n-1=22


i.e.n=23




More from this chapter

All 167 →
9

If , then find the value of n.

 10

If mth term of an A.P. is n and nth term is m, then write its pth term.

 1

Mark the correct alternative in the following:

If 7th and 13th terms of an A.P. be 34 and 64 respectively, then its 18th term is


 2

Mark the correct alternative in the following:

If the sum of p terms of an A.P. is q and the sum of q terms is p, then the sum or p + q terms will be