Question

The 6th and 8th terms of an "AP"is 20 and 40 respectively then the common difference is​

Answer 1

Step-by-step explanation:

a6=20

=>a+5d=20......(1)

a8=40

=>a+7d=40.......(2)

Subtracting equation (1) from (2):

a+7d-a-5d=40-20

=>2d=20

=>d=10

Thus, the common difference is 10.