Question

what is the common difference if an a.p in which a10 _ a8 = 42​

Answer 1

Answer:

a10-a8 = 42

a+9d-(a+7d) = 42

a+9d-a-7d = 42

2d = 42

d = 21

Thus common difference is 21

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Answer 2

a¹⁰ - a⁸ = 42

a+9d - a+7d = 42

16d = 42

d= 42/16

d= 21/8

d= 2.62