The set {-1, 0, 1} is not closed under which operation?

asked Jun 27, 2017 85.8k views

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3 votes

Hello,

if find the square root of a real is an operation then
√(-1)∉{-1,0,1}.

Oliver Giesen answered Jun 28, 2017

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3 votes

The set {-1, 0, 1} is NOT closed under subtraction.
-1- (0) = -1
But,
-1 - (1) = -2
Hence,The result -2 is not in the set.
I hope it helped.

Gust answered Jul 1, 2017

by Gust

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