



 
Natalie, One should use parentheses to make it clear what goes with what. I interpret the denominator to be You can learn a great deal about the graph of the function without using calculus, by just examining the form of the function.
You indicated that your problem is with concavity so I assume you have found the first derivative and determined that the critical points are at x = 0 and x = 2. You can now sketch the graph quite easily. If you need to find the points where the graph changes concavity then you are faced with solving f"(x) = 0. Chris and Harley  


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