If f(x) = 1/(2x) and g(x) = 3+x find (and simplify) the defining equation of the composition function g \circle f .

I don't have any idea how to combine these two functions, can anyone help?

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- Feb 28th 2009, 09:25 AM14041471composition of function
If f(x) = 1/(2x) and g(x) = 3+x find (and simplify) the defining equation of the composition function g \circle f .

I don't have any idea how to combine these two functions, can anyone help? - Feb 28th 2009, 09:28 AMred_dog
$\displaystyle (g\circ f)(x)=g(f(x))=g\left(\frac{1}{2x}\right)=3+\frac{1 }{2x}=\frac{6x+1}{2x}$

- Feb 28th 2009, 09:28 AMskeeter