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Logarithmic function problems

  • Thread starter feiser
  • Start date
  • #1
2
0

Homework Statement


solve x.
Log(35-x^3)/Log(5-x)=3


Homework Equations


Log(a/b)=Log a - Log b


The Attempt at a Solution


The answers would be 3 or 2
(so i'm guessing it has sumthing to do with quadratics)
i tried to expand the left side first, then rearrange it to Log(7/x^4)=3
the problem is thats not giving me the answer, which i got was 0.28925076.
 
Last edited:

Answers and Replies

  • #2
275
2
The relevant equations you gave aren't necessary for the problem.
Move the Log(5-x) to the right hand side, then eliminate the logarithms. Then its just an algebra problem.
 
  • #3
2
0
Thanks.
 

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