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September 7th, 2018, 11:46 AM  #1 
Newbie Joined: Aug 2018 From: Czech Republic Posts: 2 Thanks: 0  Problem with an exponential equation
Hi, I need help with this exponential equation. Normally, I would use 3^x as a substitution, but the 3^(x) is kinda confusing me. How am I supposed to solve this? Thanks. 9*3^x+3^(x)=10 So I figured it out: 1/3^x = 3^(x) Last edited by ducanhle; September 7th, 2018 at 11:51 AM. Reason: Figured it out 
September 7th, 2018, 11:58 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,969 Thanks: 2218 
If x is real, x = 0 or 2.

September 7th, 2018, 12:07 PM  #3 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,597 Thanks: 1038  

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equation, exponential, problem 
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