Question

If the sum of n terms of two A.P are in the ratio 3n + 8 : 7n + 15 then find the rayio of their 12th terms

Answer 1

Step-by-step explanation:

3n+8: 7n+15

we know that n=12

ratios of 12th terms is:-

3(12)+8:7(12)+15

36+8:84+15

44:99

= 4:9