Limits problem help

  • Thread starter duki
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  • #1
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Homework Statement



lim as x->infinity [tex]\frac{5x^3-3x^2+8}{ 2x^3 + 9}[/tex]

Homework Equations




The Attempt at a Solution



I was told you can look at this highest exponent for the num and dem to find the limit, but I'm not sure what that means. In this case would it be 5/2 because the Xs cancel out?
 

Answers and Replies

  • #2
Dick
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Divide top and bottom by x^3. As x->infinity terms like -3/x go to zero. Get rid of them. So yes, you are left with 5/2.
 
  • #3
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Ok thanks. It makes sense now.
 

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