Pointwise convergence of (x^n)/(1 + x^n)

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SUMMARY

The function (x^n)/(1 + x^n) converges pointwise to 0 on the interval [0,1), to 1/2 at x = 1, and to 1 on the interval (1,2]. This conclusion is reached by analyzing the behavior of the function as n approaches infinity. Specifically, dividing the numerator and denominator by x^n simplifies the expression, revealing the limiting behavior for x > 1.

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Homework Statement


Find the function that (x^n)/(1 + x^n) converges to as n goes to infinity, on the interval [0,2]


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The Attempt at a Solution


I've worked out the fact that on the interval [0,1) it converges to 0, and when x is 1 it converges to 1/2, but for the life of me I'm not sure what the first step of proving what it converges to on the (1,2] interval. hints?
 
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Divide numerator and denominator by x^n. Now can you figure out what it converges to on (1,2]?
 
Yes! It becomes 1 / ( 1/(x^n) + 1), which goes to 1 / (0+1) = 1.

Thank you so much :)
 

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