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Now, when x=1 then a/b=1 ===>a=b
when x=-1 then a/b=-1 =====>a=-b

Thus, a=+-b

Thanx a lottt @sauravshakya.:)

@ajprincess can u tell me the statement in easier way ??

Hmm, I take it that you meant a/0 is not defined.

ya! I gt it a little but \(\frac{a}{b}\) doesn't this mean b divides a

ya u can take it that way @parthkohli

a|b and a/b are different.

\[a\ne 0, b \ne 0\]because if one of them is zero, then one of \(a|b\) or \(b|a\) will be false. =)

ohh ! i thought it is a/b i gt it completely, thanx :)

\(b|a\) is the same as \(bx = a :x\in \mathbb{Z}^{+}\)

ya u are absolutely right:) @ParthKohli and welcome:) @jiteshmeghwal9

Nice proof! @sauravshakya