Two quick videos. First one is on how to draw square root functions. A common mistake is to think that the solutions to the graph of x^(1/2) is f(x)=+√x and √x. That would give two f(x) values for each x value and the graph wouldn't be a function. The video shows that there is a separate function for x^(1/2) and x^(1/2). The other one just shows the graph of x^(1/3). Check out the whole calculus playlist here. 
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