Question

AP 3,5,8 ----------(+60)​

Answer 1

Answer:

A= 3,

D= T2 - T1 = 5-3 = 2, T3- T2 = 3

There is a variation in the difference between the numbers. Since the numbers have no common difference, we come to a conclusion that this set of numbers are not in AP.

Answer 2

Answer:

28

Step-by-step explanation:

a=3,d=5-3=2,an=2,n=?

         an=a+(n-1)×d

          60=3+(n-1)×2

            60÷2=3+(n-1)

              30-3=(n-1)

                 27=n-1

                   27+1=n    

                      28=n