Question

given a=3,n=8,s=192 find d​

Answer 1

S = n/2(2a + (n-1)d)

192 = 4(6 + 7d)

6 + 7d = 49

7d = 48

d = 42/7

d = 6

Thereby, the value of d is 6.

Answer 2

S = n/2(2a + (n-1)d)

192 = 4(6 + 7d)

6 + 7d = 49

7d = 48

d = 42/7

d = 6