Question

The nth term of an A.P. is given by an = 3 + 4n. The common difference is​

Answer 1

Answer:

an = 3 + 4n....1

an = a + ( n-1)d

sub. value of eq. 1

3 + 4n = a +(n-1)d

3+4n-a/(n-1) = d

THEREFORE

d = 3+4n-a/(n-1)