Unraveling the Mystery of y=1+x+x^3

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SUMMARY

The discussion focuses on the mathematical function y=1+x+x^3, specifically addressing the concepts of domain and range. The domain consists of all x values that do not cause issues within the function, while the range includes all possible y values that the function can produce. Participants emphasize analyzing the behavior of y as x approaches both positive and negative infinity to determine the range. The conversation clarifies that understanding these concepts is essential for grasping the function's characteristics.

PREREQUISITES
  • Understanding of basic algebraic functions
  • Knowledge of domain and range in mathematics
  • Familiarity with limits and behavior of functions at infinity
  • Basic calculus concepts (optional for deeper analysis)
NEXT STEPS
  • Research the domain and range of polynomial functions
  • Study the behavior of functions as x approaches infinity
  • Explore inverse functions and their properties
  • Learn about graphing techniques for polynomial equations
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Students, educators, and anyone interested in understanding polynomial functions, particularly those seeking clarity on domain and range concepts.

qablos
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y=1+x+x3I just don't know where to begin...
I've always struggled with domains and ranges.

Even if you could just point me in the right direction, that would be great!

Thanks.
 
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The domain is the set of all possible x values for your function which don't cause problems. Think about this, are there any x values which your function will have a problem?

As for the range, it's the set of all possible y values your function can take on. Do your y values take on all of the real numbers or are there some which are not included?
 
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Look at what happens to y as x goes to infinity and as x goes to negative infinity. This is problem is much simpler than I suspect you realize! If the problem were about the inverse function, that would be another matter.
 

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