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ali03
Lv 5
ali03 asked in Science & MathematicsMathematics · 1 decade ago

help please....f(x)= square root of x, g(x)= x+2?

Please Find:

a. (f o g )(x)

b. (g o f) (x)

c.(f o g) (2)

2 Answers

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  • railbuff
    Lv 7
    1 decade ago
    Favorite Answer

    f o g(x)

    = f(g(x))

    = f(x + 2)

    = sqrt(x + 2)

    g o f(x)

    = g(f(x))

    = g[sqrt(x)]

    = sqrt(x) + 2

    f o g(2)

    = sqrt(2 + 2)

    = sqrt(4)

    = 2

    Source(s): retired math teacher
  • Anonymous
    1 decade ago

    A.) (f o g)(x) = √ x+2

    B.) (g o f)(x) = √x + 2

    C.) (f o g)(x) = √x + 2 (sub 2 into x)

    √4 = 2

    (f o g)(x) = 2

    not much to explain, just replace the x into the equation

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