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Let f: R → R be defined as f(x) = x4. Choose the correct answer: (a) f is one-one onto. (b) f is many-one onto.

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Let f: R → R be defined as f(x) = x4.

Choose the correct answer:

(a) f is one-one onto.

(b) f is many-one onto.

(c) f is one-one but not onto.

(d) f is neither one-one nor onto.

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(D) f is neither one-one nor onto

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