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Let f : N rarr R be a function defined b...

Let `f : N rarr R` be a function defined by `f(x) = 4x^(2) + 5 `. Then f (2), f(3), f(5), f(6) is :

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Knowledge Check

  • Let f:R to R be a function defined by f(x)=(x^(2)-8)/(x^(2)+2) . Then f is

    A
    one-one but not onto
    B
    one-one and onto
    C
    one but not one-one
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    neither one-one nor onto

  • Let f:R rarr R be a function defined as f(x)=(x^(2)-6)/(x^(2)+2) , then f is

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    one - one but not onto
    B
    one - one and onto
    C
    onto but not one - one
    D
    neither one - one nor onto

  • Let f:R to R be a function defined b f(x)=cos(5x+2). Then,f is

    A
    injective
    B
    surjective
    C
    bijective
    D
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