Q. 153.8( 43 Votes )

If the ratio of t

Answer :

Given ratio of sum of n terms of two AP’s = (7n+1) : (4n + 27)...........(1)

Let’s consider the ratio of these two AP’s mth terms as am : Am -------------(2)

For first A.P first term is a and common difference is d.

For second A.P first term is a' and the common difference is d'.

nth term of AP formula,

an = a + (n – 1)d

Hence equation (2) becomes,

On multiplying and dividing by 2, we get





 .... (3)


As we know,




So, (3) becomes,







Thus the ratio of mth terms of two AP’s is [14m – 6] : [8m + 23].

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