Question

First term of an A.P is -5 whereas first term of another A.P is 16. If both the A.P's common difference is same, then find the difference between 25th term of 2nd A.P and the 25th term of 1st A.P

Answer 1

For 1st AP
a25=a1 + 24d
For 2nd AP
b25=b1 + 24d

b25 - a25= b1 - a1
= 16-(-5)
= 21