Easy Pre-Calc Question - Natural Logs

  • Thread starter Thread starter sjaguar13
  • Start date Start date
  • Tags Tags
    Natural
Click For Summary
SUMMARY

The discussion centers on solving the equation e^{-x^2}=(e^x)^3(\frac{1}{e^4}). The user correctly simplifies the equation to -x^2=3x-4 and factors it to find the solutions x=-4 and x=1. There is a query regarding potential restrictions on the values of x, indicating a need for further exploration of the domain of the function involved.

PREREQUISITES
  • Understanding of exponential functions and natural logarithms
  • Familiarity with algebraic manipulation and factoring techniques
  • Knowledge of solving quadratic equations
  • Basic concepts of function domains and restrictions
NEXT STEPS
  • Study the properties of exponential functions and their graphs
  • Learn about the quadratic formula and its applications
  • Research domain restrictions for exponential and polynomial functions
  • Explore the implications of complex solutions in quadratic equations
USEFUL FOR

Students studying pre-calculus, educators teaching algebraic concepts, and anyone interested in mastering the manipulation of exponential equations.

sjaguar13
Messages
49
Reaction score
0
[tex]e^{-x^2}=(e^x)^3(\frac{1}{e^4})[/tex]


Wouldn't all the Es cancel out?
[tex]-x^2=3x-4[/tex]

Move the 3x and factor out a -x:
[tex]-x(x+3)=-4[/tex]

Now I got nothing.
 
Physics news on Phys.org
try moving the -x^2 over to the right side.
 
OHHHH...
[tex]0=-x^2+3x-4[/tex]

Do a little factorin'
[tex](x+4)(x-1)[/tex]

[tex]x=-4 or x=1[/tex]

Both of those are the answer, right, or is there a restriction on x?
 

Similar threads

  • · Replies 18 ·
Replies
18
Views
2K
  • · Replies 7 ·
Replies
7
Views
1K
Replies
24
Views
4K
Replies
9
Views
3K
Replies
1
Views
2K
  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 6 ·
Replies
6
Views
1K
  • · Replies 2 ·
Replies
2
Views
1K
Replies
3
Views
2K
Replies
21
Views
2K