What are the domain, range, x-intercept, and vertical asymptote of y=logₓ4?

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Discussion Overview

The discussion revolves around the mathematical properties of the function y=logₓ4, specifically focusing on its domain, range, x-intercept, and vertical asymptote. Participants explore various approaches to analyze the function, including rewriting it in different forms.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification, Homework-related

Main Points Raised

  • One participant requests assistance in determining the domain, range, x-intercept, and vertical asymptote of the function.
  • Another suggests rewriting the function as x^{y}=4 to facilitate finding the desired properties.
  • A participant notes that the domain is restricted to x>0 due to the nature of real exponents.
  • One participant points out that x=1 must be excluded from the domain, indicating a potential vertical asymptote.
  • A participant expresses confusion about the topic and requests a simpler explanation.
  • There is a question raised about the definition of a vertical asymptote, indicating a lack of clarity on the concept.
  • A later reply discusses the transformation of the function into y=\frac{\ln 4}{\ln x}, referencing the earlier suggestion to rewrite it.

Areas of Agreement / Disagreement

Participants express varying levels of understanding and confusion regarding the function and its properties. There is no consensus on the vertical asymptote or the complete characterization of the function.

Contextual Notes

Some participants highlight the need to exclude x=1 from the domain, but the implications of this exclusion on the vertical asymptote and other properties remain unresolved. The discussion also reflects differing levels of familiarity with logarithmic functions and their transformations.

Who May Find This Useful

This discussion may be useful for students learning about logarithmic functions, their properties, and transformations, particularly those seeking clarification on domain and asymptotic behavior.

Erin_Sharpe
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y=logx4
state domain and range, x-intercept, vertical asymptote.

I have never seen a question like this before.

Please help me!
 
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It might be easier to find what you're after by the rewriting:
[tex]x^{y}=4[/tex]
 
Note that since for real exponents, the exponential is only defined for positive numbers, so the maximal domain for x is x>0.
Try and find out the range and where a vertical asymptote must be!
 
HINT:It may be much easier if u rewrote it:
[tex]y(x)=\frac{\ln 4}{\ln x}[/tex]

Daniel.
 
Oops!
x=1 must be excluded from the domain!
 
:( this is so sad. because I completely don't understand this at all. it just makes absolutely no sense to me... is there any way it could be explained to me any easier?
 
vertical asymptote... 4? :s
 
What's the definition of a vertical asymptote...?

Daniel.
 
Erin sharpe:
Do you understand the transformation:
[tex]y=log_{x}4\to{x}^{y}=4\to{y}=\frac{ln(4)}{ln(x)}[/tex]
(the last step was given by Daniel)
 

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