Question

an ap consists of 37 terms the sum of the three middle most terms is 225 and the sum of the last three terms is 429 find the AP

Answer 1

AP is 3,7,11,15,.......
because on solving the equations
3a+54d=225 and 3a+105d=429
we get a=3 and d=4

Answer 2

hope it will help u the most !!!