
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
 LinkBack  Thread Tools  Display Modes 
June 27th, 2016, 09:02 AM  #1 
Newbie Joined: Jun 2016 From: London Posts: 2 Thanks: 0  Hello  quick bit of number manipulation !
Hi there, I have attached a question. It's the first part of the question I'm on. (3/2)*^4sqrt(72^(1/4)) I got it down to 3/2 * 2^(3/4) * 3^(1/2) but I don't know how to get rid of the initial fraction. I know the answer is 2^(1/4) * 3^(3/2) I hope I wrote that out right. Can some one explain how to go from where I am, to the solution?? Any help would be great, thanks. Last edited by skipjack; June 27th, 2016 at 10:19 PM. 
June 27th, 2016, 10:21 AM  #2  
Senior Member Joined: May 2016 From: USA Posts: 1,310 Thanks: 551  Quote:
$\dfrac{3}{2} * \sqrt[4]{72} =$ (3/2) * 72^(1/4). Anyway $\dfrac{3}{2} * \sqrt[4]{72} = \dfrac{3}{2} * \sqrt[4]{2^3 * 3^2} = \dfrac{3}{2} * \sqrt[4]{2^3} * \sqrt[4]{3^2} =$ $3^1 * 2^{1} * 2^{(3/4)} * 3^{(2/4)} = 2^{(1/4)} * 3^{(3/2)}.$ That's it. You can't take it any further than that in the format specified. EDIT: This is not number theory. It belongs in elementary algebra. No biggie, but you will get much quicker answers if you post in the correct forum. Last edited by skipjack; June 27th, 2016 at 10:22 PM.  
June 27th, 2016, 04:32 PM  #3 
Newbie Joined: Jun 2016 From: London Posts: 2 Thanks: 0 
Yes thanks, I wasn't entirely sure how to represent the equation (if it is in fact that) in the correct manor. May I ask how you get your computer to type it in such a way? I apologise for the amateurish question, I'm somewhat unfamiliar with the way of making my computer present the terms in such a way as you have. I also wasn't sure where to post this  hence why I wasn't able to find assistance via google etc. May I ask what exactly that would be referred to as ? Also, by the sounds of it  it's quite a beginner question? Is it reasonable that if I was unsure of how to solve the last parts, I would struggle with more intense maths? Thanks for you help all the same, Kind Regards. 
June 27th, 2016, 05:26 PM  #4 
Senior Member Joined: May 2016 From: USA Posts: 1,310 Thanks: 551 
It is perfectly acceptable to use "inline" expressions to ask questions. That format just involves typing in accord with PEMDAS (which I think may be abbreviated BEDMAS in the UK). This site supports LaTeX, which permits formatting in more "professional" format, but I STRONGLY suggest that beginning students not bother with it. It is fussy and distracts a lot from thinking about math. Most tutors use it because it is easier for students to read, but we can deal with inline format. Your question is on the borderline between arithmetic and "elementary algebra." The term "elementary algebra" is a little misleading: it covers easy topics to fairly difficult ones. It is elementary because it deals with numbers rather than more complicated kinds of mathematical objects such as vectors or matrices. The only reason that I mentioned that this was not the appropriate forum is that you will get quicker answers if you post in the elementary algebra forum. I suspect one question is not going to determine where you are in math. If you are at all unsure, take a course that may be too easy. Math is progressive. If you do not grasp algebra, you will drown in calculus. If a quadratic equation gives you fits, you will tear your hair out over cubic equations. 
June 30th, 2016, 05:06 PM  #5  
Senior Member Joined: Jan 2014 From: The backwoods of Northern Ontario Posts: 390 Thanks: 70  Quote:
 
June 30th, 2016, 05:32 PM  #6 
Senior Member Joined: Jan 2014 From: The backwoods of Northern Ontario Posts: 390 Thanks: 70 
Ultinator, here's how to do a couple of easy things in LaTeX: Suppose you want to type 2^3 as $\displaystyle 2^3$. After you click "Reply to Post," do the following: 1. Click the "Go Advanced" button. 2. Type 2^3 3. Highlight 2^3 4. Click the Σ symbol. This will place bracketed MATH before it and [/MATH] after it. 5. Click on Preview Post to see how it will look if you post it. Now suppose you want to type 3/4 as $\displaystyle \frac {3}{4}$ 1. Again make sure you are in the advanced mode 2. Type \frac {3}{4} 3. Highlight it and hit it with the Σ symbol again. 4. Again Preview Post. Last edited by Timios; June 30th, 2016 at 05:39 PM. Reason: Typo 

Tags 
bit, manipulation, number, quick 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Finding number of prime factores (plz quick)  frazza999  Number Theory  3  November 7th, 2014 01:04 AM 
How is this algebraic manipulation possible?  shreddinglicks  Algebra  5  October 10th, 2014 02:59 AM 
Algebraic Manipulation  tinku  Algebra  3  February 23rd, 2012 05:57 PM 
Algebraic Manipulation...  Liqwde  Algebra  4  September 1st, 2010 02:53 PM 
Matrix Manipulation  dipsopoirot  Linear Algebra  3  December 8th, 2008 01:57 PM 