Question

four different integers from an increasing AP one of these number is equal to the sum of the squares of the other three numbers then what is the common difference
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Answer 1

let the four different integers be a+d,a+2d,a+3d,a+4d.

let one no. be a+4d

by given Condition,

a+4d=(a+d+a+2d+a+3d)

a+4d=(3a+6d)

a+4d=3a+6d

a-3a=6d-4d

-2a=2d

-a=d

hey! is it correct I am not that much good in maths....

may be it is correct...