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June 20th, 2017, 06:38 PM  #1 
Member Joined: Aug 2014 From: Mars Posts: 88 Thanks: 8  What is f(x)=5^(x1)?
I saw this on a test, but can't remember what it was referring to. I've been on Khan Academy and can't find an explanation. $f(x)=5^{x1}$ I chose $f(0)$ Last edited by skipjack; June 21st, 2017 at 06:33 AM. 
June 20th, 2017, 08:02 PM  #2 
Math Team Joined: Jul 2011 From: Texas Posts: 2,569 Thanks: 1272 
You're not giving much to go on here ... fyi, $f(0)=\dfrac{1}{5}$

June 20th, 2017, 10:02 PM  #3 
Global Moderator Joined: Dec 2006 Posts: 17,478 Thanks: 1314 
Was it a Khan Academy test?

June 21st, 2017, 04:46 AM  #4 
Member Joined: Aug 2014 From: Mars Posts: 88 Thanks: 8 
No, it was an accuplacer. It's taken me a little while to realize it, but the whole test is covering algebra II which I have never taken. The practice tests are in no way representative of what is on the actual tests. But I'm 3 points away from getting into the class I need, so I'm studying as much as I can. Why does $f(0)=\dfrac{1}{5}$ ? 
June 21st, 2017, 06:14 AM  #5 
Member Joined: Aug 2014 From: Mars Posts: 88 Thanks: 8 
I get it $5^{1}=\dfrac{1}{5}$ Didn't even see the setup. 
June 22nd, 2017, 03:51 AM  #6 
Math Team Joined: Jan 2015 From: Alabama Posts: 2,515 Thanks: 640 
I don't understand why Opposite "chose f(0)"! What was the question?
