Question

The sum of n terms of two arithmetic progressions are in the ratio (n + 1) : (n + 2), then the ratio of their 12th terms is ​

Answer 1

Answer:

Let

is the first term and

is the common difference of the first AP.

Let is the first term and

is the common difference of the second AP.<br> Then,Comparing numerators for both sides,

Similarly, comparing denominators of both sides,

So, ratio of their terms,

So, required ratio is