Question

what is modules function one one or onto?​

Answer 1

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It is known that f(x) = |x| is always non-negative. Thus, there does not exist any element x in domain R such that f(x) = |x| = - 1. ∴ f is not onto. Hence, the modulus function is neither one-one nor onto.

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Answer 2

Answer:

It is known that f(x) = |x| is always non-negative.

Thus, there does not exist any element x in domain R such that f(x) = |x| = - 1.

∴ f is not onto.

Hence, the modulus function is neither one-one nor onto.