Question

the sum of first n terms of two APs are in the ratio (3n+8): (7n +15).
Find the ratio of their 12th terms.


plzz... solve...​

Answer 1

Step-by-step explanation:

ratio of first n terms of two APs= 3n+8: 7n+15

ratio of their 12th terms= ?

so, substitute n= 12

then, 3n+8: 7n+15= 3(12)+8: 7(12)+15

= 44: 99

= 44/99= 4/9= 4:9

so, ratio= 4:9

Answer 2

Answer:

answer is 4:9 but ye bakwas sawal khud se kiya kro