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

 It is currently 06 May 2015, 11:34

### 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 (3^a)*(4^b)=c , then what is the value of b? 1. 5^a=25 2.

Author Message
TAGS:
SVP
Joined: 03 Jan 2005
Posts: 2250
Followers: 13

Kudos [?]: 217 [0], given: 0

Yes there is.

3^x=36
xln3=ln36=ln(4*9)=lin4+ln9=ln4+2ln3
(x-2)ln3=ln4
x-2=ln4/ln3
x=ln4/ln3+2
_________________

Keep on asking, and it will be given you;
keep on seeking, and you will find;
keep on knocking, and it will be opened to you.

SVP
Joined: 01 May 2006
Posts: 1805
Followers: 8

Kudos [?]: 99 [0], given: 0

Good point HongHu.

The DS is not saying that a and b are intergers . Thus, it exists infinite solutions with a not fixed.

Go to page   Previous    1   2   [ 22 posts ]

Similar topics Replies Last post
Similar
Topics:
3 Q1 If 3^a*4^b = c, what is the value of b? (1) 5^a = 25 (2) 9 10 Dec 2010, 00:00
5 If 3^a * 4^b = c, what is the value of b? (1) 5^a = 25 (2) c 6 01 May 2011, 06:42
10 If 3^a*4^b = c, what is the value of b? (1) 5^a = 25 (2) c = 25 10 Dec 2010, 00:00
If xy= 1, what is the value of 2^ / 2^ ? A) 2 B) 4 2 14 Nov 2006, 10:46
a#=a^2+2, what is the value of b#? 1. (b-1)#=3 2. (b+2)#=6 2 10 Dec 2005, 05:09
Display posts from previous: Sort by