Finding lim f(x) as x->+/- infinity?

  • Thread starter Thread starter mimitka
  • Start date Start date
  • Tags Tags
    Infinity
Click For Summary
SUMMARY

The limit of the function f(x) = x^(5/3) - 5x^(2/3) as x approaches both positive and negative infinity is determined by the dominating term, which is x^(5/3). By factoring out x^(5/3), the expression simplifies to f(x) = x^(5/3)(1 - x^(-1)). As x approaches positive infinity, the limit approaches positive infinity, while as x approaches negative infinity, the limit approaches negative infinity. This analysis confirms that the behavior of the function is primarily influenced by the highest degree term.

PREREQUISITES
  • Understanding of polynomial functions and their limits
  • Familiarity with the concept of dominating terms in limits
  • Knowledge of factoring techniques in algebra
  • Basic calculus concepts, particularly limits at infinity
NEXT STEPS
  • Study the properties of polynomial limits in calculus
  • Learn about asymptotic behavior of functions
  • Explore advanced factoring techniques for polynomial expressions
  • Investigate the concept of limits involving rational functions
USEFUL FOR

Students of calculus, mathematicians, and anyone interested in understanding the behavior of polynomial functions at infinity.

mimitka
Messages
3
Reaction score
0
Finding lim f(x) as x-->+/- infinity?

f(x)= x^(5/3)-5x^(2/3)

Need to find limit f(x) as x-->+infinity, and x-->-infinity?
 
Physics news on Phys.org


Which term dominates as x approaches +/- infinity?
 


Factor out x5/3: f(x)= x5/3(1- x-1) The limit of 1- x-1, as x goes to plus or minus infinity should be pretty easy. What does that tell you ?
 

Similar threads

  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 10 ·
Replies
10
Views
1K
Replies
3
Views
2K
  • · Replies 20 ·
Replies
20
Views
3K
Replies
1
Views
1K
Replies
2
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K