Value of this function as n approaches infinity

  • #1
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Homework Statement


f(x) = lim [tex]_{n->\infty}[/tex](x[tex]{n}[/tex])/(1+x[tex]{n}[/tex])


Homework Equations



Suppose that x=1

The Attempt at a Solution



Wouldnt f(x) = 1/2? Because 1^n = 1, so the denominator is 2. The solution says that f(x)=1. Why is that?
 

Answers and Replies

  • #2
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Hi
yes the answer is f(x)=1 because both of them have the highest power of n so based on that if you have the same power you just take the cofficient which is one.
x^n/x^n = 1 when the limit goes to infinity.
 
  • #3
LCKurtz
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Yes f(1) is 1/2. The limit is 1 if x > 1 and 0 for x between 0 and 1.
 

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