Solving Continuous Functions: Find g(3) When f(3)=5 and lim x→3 [2f(x)-g(x)]=4

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Homework Statement


If f and g are continuous functions, with f(3) = 5 and \stackrel{lim}{x\rightarrow3}\left[2f(x) - g(x)\right] = 4 find g(3)


The Attempt at a Solution


I'm stumped! I cannot find anything in my notes on where to begin. I am not looking for a specific answer, I just need to be pointed in the right direction. Where do I begin?
 
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try taking the limit, you know the limt of f
 
And you know, by the continuity of g, that
\lim_{x \rightarrow 3} g(x) = g(3)
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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