Question

find if 100 is a term of the A.P,25,28,31,.........or not

Answer 1

Here an=100
an=a+(n-1)d
100=25+(n-1)3
75=(n-1)3
75/3=n-1
25=n-1
26=n
So 100 is a term of this Ap
And it is 26th term

Answer 2

Answer:Hope it will help