Question

First term of an AP is 4 and the common difference is 3.It's 12 th term is same as the 8 th term of anothe AP with first term -5.Find the common difference of second AP.

Answer 1

n12 = 4+11×3= 37


for 2nd AP
-5+7d = 37
7d =42
d= 6


ty mate hope it help

Answer 2

a1+(n1-1)d1=a,1+(n2-1)d2
=4+11*3=-5+7*d
42=7d
:d2=42÷7=6
hence common difference of that ap is 6
hope it helps