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If f:R➡R given by f(x)=x square …

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If f:R➡R given by f(x)=x square . Why can't it be onto function? Plzz give me a brief description on this.

    • Posted by Ruchi Mishra 8 years ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Vaibhav Mathur 8 years ago

    See. As it is given that f(x)= x square so F(2)=4 and F(-2) is also equal to 4 .so 2 belongs to codomain of but -2 doesn't belongs to codomain of F hence the function is not on to function

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