Question

13,17,21,......check sequence is an Arithmatic progression or not​

Answer 1

Answer:

yes it is an AP

Step-by-step explanation:

here a1 = 13

a2 = 17

d = a2 - a1 = 17 - 13 = 4

Again ,

a3 = 21

d = a3 - a2 = 21 - 17 = 4

As d remains constant , so the given sequence is an AP

Answer 2

Step-by-step explanation:

here, a1= 13 ,, a2= 17 and a3 = 21

NOW,, a2-a1= 17- 13 = 4

Also , a3- a2 = 21 - 17 = 4

since common difference ( d) is same in both cases ...

Therefore,,,, given sequence is in A.p