My Math Forum  

Go Back   My Math Forum > High School Math Forum > Algebra

Algebra Pre-Algebra and Basic Algebra Math Forum


Thanks Tree3Thanks
  • 2 Post By skeeter
  • 1 Post By Country Boy
Reply
 
LinkBack Thread Tools Display Modes
June 20th, 2017, 06:38 PM   #1
Member
 
Joined: Aug 2014
From: Mars

Posts: 88
Thanks: 8

What is f(x)=5^(x-1)?

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.

$f(x)=5^{x-1}$

I chose $f(0)$

Last edited by skipjack; June 21st, 2017 at 06:33 AM.
Opposite is offline  
 
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, $f(0)=\dfrac{1}{5}$
Thanks from topsquark and Joppy
skeeter is offline  
June 20th, 2017, 10:02 PM   #3
Global Moderator
 
Joined: Dec 2006

Posts: 17,478
Thanks: 1314

Was it a Khan Academy test?
skipjack is offline  
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 $f(0)=\dfrac{1}{5}$ ?
Opposite is offline  
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.
Opposite is offline  
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?
Thanks from topsquark
Country Boy is offline  
Reply

  My Math Forum > High School Math Forum > Algebra

Tags
fx5x1



Thread Tools
Display Modes






Copyright © 2017 My Math Forum. All rights reserved.