Question

given that the first term of an arithmetic progression is 5.and the sum of the first 6 terms of an A.P differ from the 8th term of an A.P by 4. find the value of common difference

Answer 1

hey mate sorry for delay but answer is here

check the attachment

a=5 s6=30+5d a8=5+7d

s6-7d=4

30+5d-5+7d=4

$d = \frac{ - 21}{12}$

$d = \frac{ - 7}{4}$