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Find gofa n dfog wehn f: RvecR and g: Rv...

Find `gofa n dfog` wehn `f: RvecR` and `g: RvecR` are defined by `f(x)=2x+3` and`g(x)=x^2+5` `f(x)=2x+x^2` and`` `g(x)=x^3` `f(x)=x^2+8` and `g(x)=3x^3+1` `f(x)=8x^3` and `g(x)=x^(1//3)`

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Knowledge Check

  • If g(x)=3x+2 and g(f(x))=x , then f(2)=

    A
    0
    B
    1
    C
    2
    D
    8

  • If f(g(x))=4x^(2)-8x and f(x)=x^(2)-4, then g(x)=

    A
    `4-x`
    B
    `x`
    C
    `2x-2`
    D
    4x

  • If f(x)=4x-5 and g(x)=3^(x) , then f(g(2)) =

    A
    3
    B
    9
    C
    27
    D
    31

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