<p>If a and b are positive integers and ((a^(1/2) X b^(1/3)= 432. What is the value of ab?
a.6
b.12
c.18
d.24
e.36</p>
<p>??????????????????</p>
<p>Ok, think about it B is only able to be 1, ,8 , 27, 64, 125, 216, 349
Try 1
You get A^.5 X 1 = 432
Well A wont be an integer
Try 8
A^.5 X 2 = 432
A^.5 = 216
A wont be an integer
Try 27
A^.5 X 3 = 432
A^.5 = 144
A = 12
B = 3</p>
<p>12 X 3 = 36</p>
<p>Wait a second this doesnt make sense</p>
<p>Are you sure they want A X B?</p>
<p>Because then you would get 144 X 27.... I think the question may be wrong.</p>
<p>yea your trying to find the value of ab...its on page 596 of the collegeboard blue book</p>
<p>This question has been discussed many times on CC. Check the posted list of questions/answers.</p>
<p>Go here and look up 596/8</p>
<p>WOW...thats awesome</p>
<p>Well considering you never put to the 6th power..... i couldn't do it.</p>
<p>What is a 'glassses; techinque that I saw in one of the questions? :/</p>
<p>o whoops sry about that lol</p>