Need help solving this logarithmic problem

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Discussion Overview

The discussion revolves around solving a logarithmic equation involving exponential functions. Participants are engaged in clarifying the problem and providing assistance in the context of a take-home test.

Discussion Character

  • Homework-related

Main Points Raised

  • The initial equation presented is \( (e^{3x})(e^{4})^x = e^{4x} - 15 \), and the poster expresses urgency in needing help to solve it.
  • One participant questions whether the original poster has permission from their professor to seek outside help for a graded assignment.
  • The original poster confirms they are allowed to seek help for three questions and must cite the source of assistance.
  • A participant suggests applying properties of exponents to simplify the equation, specifically using \( (a^b)^c = a^{bc} \) and \( a^b \cdot a^c = a^{b+c} \) to manipulate the equation.
  • The original poster later clarifies a misunderstanding regarding the equation's interpretation, indicating they misread part of it.
  • Another participant notes that the original interpretation of the equation has no real solutions and expresses satisfaction that the original poster resolved their confusion.

Areas of Agreement / Disagreement

Participants generally agree on the approach to solving the equation, but there is a misunderstanding initially regarding the interpretation of the equation. The discussion reflects a resolution of that misunderstanding without consensus on the overall solution.

Contextual Notes

The discussion includes a potential misinterpretation of the equation, which may affect the understanding of its solutions. There is also a dependency on the properties of exponents that are applied in the problem-solving process.

Sharpy1
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(e3x)(e4)x = e4x -15

Could use help solving this here within the next 40 minutes, appreciate the help, this is the last one out of a 75 question take home test and I'm having soo many issues.

Thanks in advanced for the help.
 
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Hello and welcome to MHB!:

Has your professor given you permission to get outside help with this graded assignment?
 
Yes only for 3 questions and we have to post where we got the outside help from.
 
Okay, we are given:

$$e^{3x}\cdot \left(e^4 \right)^x=e^{4x}-15$$

I would first use the property of exponents $$\left(a^b \right)^c=a^{bc}$$ on the second factor on the left, and so we have:

$$e^{3x}\cdot e^{4x}=e^{4x}-15$$

What do we get when we apply the property $$a^b\cdot a^c=a^{b+c}$$ on the left?
 
I have it now, I was reading it as e4x-15 not e4x-15

Thanks for the help everyone
 
Your original interpretation has no real solutions. Glad you figured it out. :D
 

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