Question

find the common difference of an ap if first term is 5 and the sum of the first 4 terms is 1/2 the next four terms​

Answer 1

Step-by-step explanation:

a=5.

(a+a+d+a+2d+a+3d)=½(a+4d+a+5d+a+6d+a+7d)

(4a+6d)=½(4a+22d)

4a+6d=3a+11d

4×5-3×5=11d-6d

20-15=5d

5d=5

d=5/5

d=1.