Question

find the common difference of A.P. when (a)n = 3n + 5 .☺​

Answer 1

an = 3n +5

an+1 = 3( n+1) +5

= 3n +3 +5

= 3n +8

an+1 - an = 3n +8 - 3n -5 = 3

3 is common difference