Can One-Sided Limits Be Evaluated Using the f(g(x)) Function?

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SUMMARY

The discussion focuses on evaluating one-sided limits using the nested function f(g(x)). It is established that the limit cannot be brought inside the f(g(x)) function unless f(x) is continuous at the limit point. Participants emphasize the importance of understanding the behavior of g(x) as it approaches zero from both the left and right, particularly when g(x) is an odd function. The key takeaway is that determining the direction from which g(x) approaches zero is crucial for evaluating the limit correctly.

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Homework Statement


http://img831.imageshack.us/img831/8131/onesided.png


Homework Equations





The Attempt at a Solution


I am quite stumped on this problem. I don't think you can bring the limit inside the f(g(x)) function unless f(x) is continuous at the point about which the limit is being evaluated.
That said, I'm quite unsure how to proceed. Any hints?

Thanks.

BiP
 
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In each case, the nested function g(x) goes to zero as x goes to zero. So, you know the limit will be one of the two possibilities you're given. It's just a matter of figuring out which direction g(x) approaches zero from in each case. E.g. if g(x) is an odd function of x (with g(x) > 0 for small x > 0) with g(0)=0, then if x approaches zero from the left, which side does g(x) approach zero from? And if x approaches from the right? And so on.
 
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