Question

Someone give me solution....

Answer 1

first term= a = 5

sum of first four terms = 4/2[2(5)+(4-1)d]

2(10+3d)= 20+6d

sum of next four terms= sum of first eight terms - sum of first four terms

4(10+7d) - 20-6d

according to ques

20+6d = 1/2[ 40+28d - 20-6d]

20+6d = 10+11d

10 = 5d

d= 2

common difference is 2

Answer 2

Answer:

Step-by-step explanation:

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