Question

if an = 3n+7 . find d​

Answer 1

Answer:

n=7-3

n=4

Is your right answer

Answer 2

Question

If an = 3n+7 . find d?

Answer

→3

Solution

an = 3n+7 (given)

So,

→if n=1, then, a1 = 3(1)+7 = 10

→if n=2, then, a2 = 3(2)+7 = 6+7 = 13

Therefore,

= d = common difference =

= a2 - a1

= 13 - 10

→= 3

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