Question

find the common difference
a,a+d,a+2d,a+3d​

Answer 1

Answer:

d=a2-a

=>d= a+d-a

=>d= d

d2=a3-a2

=>d2= a+2d-(a+d)

=>d2= a+2d-a-d

=>d2=d

So the common difference is d.

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