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If f(x)=x+7, and g(x)=x-7, x in R" them ...

If `f(x)=x+7, and g(x)=x-7, x in R" them find "d/(dx)(fog )(x).`

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If f (x)=x+7 , and g (x)=x-7 , x in R , then d/(dx) (gof)(x)=_____

If f(x)=x+7 and g(x)=x-7,x in R, find (fog)(7)

Knowledge Check

  • If f(x) = 2x + 7 and g(x) = x^2 + 7, x in R then which value of x will satisfy fog(x) = 25 ?

    A
    -1,1
    B
    -2,2
    C
    `-sqrt2, sqrt2`
    D
    None of these

  • If f(x) = 7x + 9 and g(x) = 7x^(2) - 3 , then (f - g)(x) is equal to

    A
    7(x + 1)
    B
    `7x - 7x^(2) + 12`
    C
    `7x - 7x^(2) - 12`
    D
    `7x^(2) + 7x - 12`

  • If f(x)=2x^(2)+7x-9 and g(x)=2x+3 , then find the vlaue of g(g(x)) at x=2

    A
    92
    B
    39
    C
    29
    D
    none of these

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    If f(x) = -2x +7 and g(x)=x^(2)-5x +6 find f(3), f(-4), g(2) and g(-1) .

    If f(x)=x^(2)+2x+7, find f'(3)

    If f (x) = ax +b and g(x) = x+d then (fog) x=(gof) x implies

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