Question

Find the common difference of ap whose first term if 5 and the sum of first four terms is half the sum of next fourth terms

Answer 1

The common difference is 2

let d is common difference of AP

now first 4term is 5,5+d,5+2d,5+3d

and next 4term 5+4d,5+5d,5+6d,5+7d

now according to question

20+6d=(20+22d)/2

20+6d=10+11d

d=2

Answer 2

Answer:

Step-by-step explanation:

Find AP which 5 term are 5 and common difference is -3