March 6th, 2014, 07:06 PM  #1 
Newbie Joined: Mar 2014 Posts: 1 Thanks: 0  cube root
What is the cube root of (81x^8y^12)? It is probably super easy, but after several tries, I just give up. Thank you so much!!! Given answers: A) 3x^2y^4 cube root of (3x^2) B) 3x^2y^4 fifth root of (3x^2) C) 3x^2y^12 cube root of (3x^2) D) 3x^2y^4 cube root of (3xy) 
March 6th, 2014, 07:29 PM  #2 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,696 Thanks: 2681 Math Focus: Mainly analysis and algebra  Re: cube root
The cube root of any product is the product of the cube root of each elements of the product. That is: Also and Armed with that, you should be able to have another go. 
March 6th, 2014, 07:40 PM  #3 
Math Team Joined: Sep 2007 Posts: 2,409 Thanks: 6  Re: cube root 
March 6th, 2014, 08:13 PM  #4 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,974 Thanks: 1156 Math Focus: Elementary mathematics and beyond  Re: cube root When multiplying exponentials with the same base, add the exponents. The above uses that rule "in reverse". 
March 7th, 2014, 12:57 AM  #5  
Global Moderator Joined: Dec 2006 Posts: 21,105 Thanks: 2324  Quote:
 

Tags 
cube, root 
Search tags for this page 
Click on a term to search for related topics.

Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Help with Cube Root:  achintya  Algebra  10  April 5th, 2013 11:33 AM 
Cube root of 2  mathmaniac  Algebra  49  March 25th, 2013 06:48 PM 
Cube Root of 1  Niko Bellic  Algebra  6  March 6th, 2013 07:18 PM 
challenging cube root problem  peri123  Number Theory  2  August 19th, 2008 10:00 AM 
Cube root of 2  mathmaniac  Number Theory  0  December 31st, 1969 04:00 PM 