# potens

• Sep 19th 2012, 06:33 AM
Petrus
potens
Expression profile https://webwork.math.su.se/webwork2_...142cdc9bc1.png as a power of 5. If not so, then https://webwork.math.su.se/webwork2_...d08713f261.png
x=?

i dont really know how to especially write 3sqrt(5) on another form :S
if i got it right i can write it like 5^1/3?
• Sep 19th 2012, 06:53 AM
Wilmer
Re: potens
Numerator: 5^1 * (5^2)^3 * 5^(1/2) = 5^1 * 5^6 * 5^(1/2) = 5^(1 + 6 + 1/2) = 5^(15/2)

Let you have the fun of doing the denominator!
• Sep 19th 2012, 07:39 AM
Prove It
Re: potens
Quote:

Originally Posted by Petrus
Expression profile https://webwork.math.su.se/webwork2_...142cdc9bc1.png as a power of 5. If not so, then https://webwork.math.su.se/webwork2_...d08713f261.png
x=?

i dont really know how to especially write 3sqrt(5) on another form :S
if i got it right i can write it like 5^1/3?

Yes, \displaystyle \displaystyle \begin{align*} \sqrt[3]{5} = 5^{\frac{1}{3}} \end{align*}
• Sep 19th 2012, 07:51 AM
Petrus
Re: potens
5^(1 + 6 + 1/2) = 5^(15/2)
idk but maybe stupid question how can that become 15/2? i cant figoure it out how u did so
• Sep 19th 2012, 08:13 AM
Prove It
Re: potens
Quote:

Originally Posted by Petrus
5^(1 + 6 + 1/2) = 5^(15/2)
idk but maybe stupid question how can that become 15/2? i cant figoure it out how u did so

Sure you know there are 15 halves in 7 and a half...
• Sep 19th 2012, 08:34 AM
Petrus
Re: potens
Quote:

Originally Posted by Prove It
Sure you know there are 15 halves in 7 and a half...

ehmm sorry but i did not understand what u mean, any way u can put it on more simple words^^? (english is my weak language)
• Sep 19th 2012, 09:04 AM
Prove It
Re: potens
If you had 7 and a half pies, and if you cut each of the whole pies in half, how many halves would you then have?
• Sep 19th 2012, 09:23 AM
Petrus
Re: potens
Quote:

Originally Posted by Prove It
If you had 7 and a half pies, and if you cut each of the whole pies in half, how many halves would you then have?

over 9000 =D joke hahaha u made my day :D
• Sep 19th 2012, 09:29 AM
Wilmer
Re: potens
Quote:

Originally Posted by Petrus
ehmm sorry but i did not understand what u mean, any way u can put it on more simple words^^? (english is my weak language)

Sorry Petrus, but if you don't understand that 7.5 = 7 1/2 = 15/2,
then speaking to you in any language will not help: you need serious classroom help.
• Sep 19th 2012, 09:29 AM
Petrus
Re: potens
holy i cant finish the last one ehmm
5^1/3*5^15?
• Sep 19th 2012, 09:35 AM
Wilmer
Re: potens
Quote:

Originally Posted by Petrus
holy i cant finish the last one ehmm
5^1/3*5^15?

Do you not know this rule: a^x * a^y = a^(x + y) ?

Your 5^1/3 needs brackets: 5^(1/3) ; no brackets means 5^1 times 3

So 5^(1/3) * 5^15 = 5^(1/3 + 15) = 5^(15 1/3) = 5^(46/3)

WHAT does "potens" mean ?????
• Sep 19th 2012, 10:14 AM
Petrus
Re: potens
Quote:

Originally Posted by Wilmer
Do you not know this rule: a^x * a^y = a^(x + y) ?

Your 5^1/3 needs brackets: 5^(1/3) ; no brackets means 5^1 times 3

So 5^(1/3) * 5^15 = 5^(1/3 + 15) = 5^(15 1/3) = 5^(46/3)

WHAT does "potens" mean ?????

ty ehmm potens is on swedish i was just lazy to google translate but in english it means Exponentiation
so now i got 5^(15/2)/5^(46/3) and next i do is 5^(15/2)-(46/3)?
• Sep 19th 2012, 10:19 AM
Petrus
Re: potens
nvm finish it :D sorry for being so stupid but i am just tired and not really good on math ohh well