Question

100 is a term or not of the A.P 25,28 & so on

Answer 1

Here a = 25
d = 28 - 25 = 3
Now , we have to find 'n'
Therefore,
100= 25+(n-1)3
75=(n-1)3
25=n-1
n = 26
So, 100 is the 26 th term of the given ap.