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March 26, 2017

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given f(x)= x^2+x and g(x)=2x+1 determine f[g(x)]

i don't even know where to start with this question help is much needed

  • Math f(x) - ,

    well, you know
    f(x) = x^2+x, so
    f(g) = g^2+g
    But, g = 2x+1, so
    f(g) = (2x+1)^2 + (2x+1) = 4x^2 + 6x + 2

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