Description
As before, R2 denote the set {(a, b) : a, b (--R}. We define the operation : R2 x R2 ⇥ R2 by (a, b) x (c, d) = (a + c + 5, 2 · b · d),
Find the identity for this operation, and prove that it is the identity
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Explanation & Answer
If we take (c,d) as (-5,1/2)
then (a,b) x (-5,1/2) = (a-5+5, 2.b.1/20 = (a,b)
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