Question

if 4th term and 7th term of AP are 8 and 14 respectively find the common difference​

Answer 1

Answer:

8= a+(4-1)d___1

14=a+(7-1)d____2

subtract 2-1

14-8=a+6d-(a+3d)

6=a+6d-a-3d

6=3d

2=d