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Consider the identity function I(N):N to...

Consider the identity function `I_(N):N to N` defined as `I _(N) (x)=x AA x in N.` Show that although `I _(N)` is onto but `I _(N) + I _(N) : N to N ` defined as
`(I _(N) + I _(N)) (x) = I _(N) (x) + I _(N) (x) = x +x = 2x ` is not onto.

Text Solution

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The correct Answer is:
`2x =3`
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