Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 23 May 2015, 00:47

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# If 5^6x = 125,000 What does 5^(2x-1) equal? I know this

 Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:
Manager
Joined: 11 Apr 2008
Posts: 129
Location: Chicago
Followers: 1

Kudos [?]: 39 [0], given: 0

If 5^6x = 125,000 What does 5^(2x-1) equal? I know this [#permalink]  03 Aug 2008, 18:29
If 5^6x = 125,000
What does 5^(2x-1) equal?

I know this problem has been posted before, but I printed it out and now I can't find the explanation anywhere. Any help would be greatly appreciated.
_________________

Factorials were someone's attempt to make math look exciting!!!

Director
Joined: 23 Sep 2007
Posts: 794
Followers: 5

Kudos [?]: 101 [0], given: 0

Re: Tricky exponents [#permalink]  03 Aug 2008, 18:37
brokerbevo wrote:
If 5^6x = 125,000
What does 5^(2x-1) equal?

I know this problem has been posted before, but I printed it out and now I can't find the explanation anywhere. Any help would be greatly appreciated.

sorry, 5^(6x) / 5^3 does not equal to 5^2x

Last edited by gmatnub on 03 Aug 2008, 18:58, edited 2 times in total.
Director
Joined: 10 Sep 2007
Posts: 949
Followers: 7

Kudos [?]: 208 [0], given: 0

Re: Tricky exponents [#permalink]  03 Aug 2008, 18:39
5^6x = 5^2x*3 = (5*10)^3
=> 5^2x = 5*10
=> 5^2x/5 = 10
=> 5^2x-1 = 10
Manager
Joined: 11 Apr 2008
Posts: 129
Location: Chicago
Followers: 1

Kudos [?]: 39 [0], given: 0

Re: Tricky exponents [#permalink]  03 Aug 2008, 18:51
abhijit_sen wrote:
5^6x = 5^2x*3 = (5*10)^3
=> 5^2x = 5*10
=> 5^2x/5 = 10
=> 5^2x-1 = 10

could you explain in a little more detail how you go from step to step?
_________________

Factorials were someone's attempt to make math look exciting!!!

Director
Joined: 23 Sep 2007
Posts: 794
Followers: 5

Kudos [?]: 101 [1] , given: 0

Re: Tricky exponents [#permalink]  03 Aug 2008, 19:03
1
KUDOS
brokerbevo wrote:
abhijit_sen wrote:
5^6x = 5^2x*3 = (5*10)^3
=> 5^2x = 5*10
=> 5^2x/5 = 10
=> 5^2x-1 = 10

could you explain in a little more detail how you go from step to step?

cuberoot this 5^6x = 5^2x*3 = (5*10)^3 on both sides

to give 5^2x = 5*10
Director
Joined: 10 Sep 2007
Posts: 949
Followers: 7

Kudos [?]: 208 [1] , given: 0

Re: Tricky exponents [#permalink]  03 Aug 2008, 19:06
1
KUDOS
gmatnub wrote:
cuberoot this 5^6x = 5^2x*3 = (5*10)^3 on both sides

to give 5^2x = 5*10

Thanks for explaning.
Manager
Joined: 11 Apr 2008
Posts: 129
Location: Chicago
Followers: 1

Kudos [?]: 39 [0], given: 0

Re: Tricky exponents [#permalink]  04 Aug 2008, 05:49
Cool. That makes sense now. Thanks.
+1 for abhijit_sen and gmatnub
_________________

Factorials were someone's attempt to make math look exciting!!!

Re: Tricky exponents   [#permalink] 04 Aug 2008, 05:49
Similar topics Replies Last post
Similar
Topics:
4 What does p equal? 3 25 Jun 2012, 10:57
1 Not sure the best way to go about this? If 5^6x=125,000 14 26 Jun 2008, 21:10
X equals to y% of what number? 1) x=3y 2) 6y + 2x = 56x / 14 2 17 Apr 2008, 08:36
Does anyone know the formula for this? If X is equal to the 1 30 Nov 2007, 08:57
Does anyone know the formula for this? If X is equal to the 5 29 Nov 2007, 23:07
Display posts from previous: Sort by

# If 5^6x = 125,000 What does 5^(2x-1) equal? I know this

 Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group and phpBB SEO Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.