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A polynomial f(x0 satisfies the conditio...

A polynomial f(x0 satisfies the condition `f(x).f(1/x)=f(x)+f(1/x)` and f(10) = 1001, then the value of f(2) =?

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[9]
`f(x) = x^n + 1`
`therefore f(10) = 10^n + 1 = 1001`
`therefore 10^n = 1000 = 10^3 implies n = 3`
then `f(x) = x^2 + 1`
`therefore f(2) = (2^3 + 1) = 9`
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  • Polynomial function f(x) satisfying the condition f(x), f(1/x)=f(x)+f(1/x) . If f(10)=1001, then f(20) is

    A
    7001
    B
    8001
    C
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    D
    none of these
  • If f(x) = x|x| , then the value of f'(-1) is -

    A
    1
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    2
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    `-1`
    D
    `-2`
  • If f(x + y) = f(x) +f(y), then the value of f(0)

    A
    a) -1
    B
    b) 0
    C
    c) 1
    D
    d) None of these
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