Question

The ratio of 7th and 3rd term of an AP is 12:5 Find the ratio of 13th to the 4th term​

Answer 1

Answer:

10:3

Step-by-step explanation:

Formula of n th term in AP = a+(n-1)d

Where a is the first term n is the term number d is the common ratio Now when n = 7 So,a+(7-1)d=a+6d

When n = 3 So,  a+(3-1)d=a+2d

Since we are given that the ratio of 7th to 3rd term of an AP is 12:5 ⇒ ⇒5a+30d=12a+24d ⇒6d = 7a ⇒a=6d/7

Now 13th term =a+(13-1)d =a+12d = 4th term =a+(4-1)d =a+3d = Now ratio of 13th and 4th

term

JAI SHREE KRISHNA