Question

check the following series are in AP or not .13,10,7,4​

Answer 1

if the series are in ap then

a2-a1=a3-a2

a1=13

a2=10

a3=7

a2-a1=10-13=-3

a3-a2=7-10=-3

therefore the series are in ap

Answer 2

Answer:

yes , the series is in AP

Explanation:

bcoz the difference b/w these no is samei.e.,-3

• 10-13=-3
• 7-10=-3
• 4-7=-3

becoz of same diff. b/w these no. so,this is AP