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/sci/ - Science & Math

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File: 37 KB, 856x559, help-sign.jpg [View same] [iqdb] [saucenao] [google]
2159315 No.2159315 [Reply] [Original]

Hi all. I need help with this bit of math... Please spare me the usual smug bullshit I see here all the time. I'm frustrated with this thing as it is.

If I could get it stage by stage that would be very neat, because I know the answer, which is the square root of 2.

2^(1/3) * 2^-(1/4)
------------------------
(2*(1/12))^-5

Those dashes are a fraction line :D

>> No.2159340

When you multiply like numbers with a power, you add the powers. When you divide like numbers with a power, you subtract the powers. When you raise a power to a power, you multiply the powers.

>> No.2159360
File: 846 B, 41x61, MSP144919da210d16ifefb4000056h1e70a9aiadf0b.gif [View same] [iqdb] [saucenao] [google]
2159360

>>2159340

See, this is the smug shit I was referring to.I'm aware of rules of exponents. It's the application in this situation I'm asking about.

What I end up with is this: (see pic)

>> No.2159371

>>2159360

Just not sure how to get to square root of 2 from this :S

>> No.2159373

>>2159360
Do your own homework. He wasn't being smug, that's how you do it. This is like seventh grade work.

>> No.2159386
File: 11 KB, 359x239, 1273191204731.jpg [View same] [iqdb] [saucenao] [google]
2159386

>>2159315
>>2159315

HAR HAR look katherine, he cannot even divide the lower number by its original setting ah har har har

>> No.2159400

>>2159360
Just flip and multiply;
a / (1/b)= ab

>> No.2159416

The first post is all you need.

exponent of numerator: 1/3 + (-1/4) = 1/12
exponent of denominator: 1/12 x -5 = -5/12

resultant exponent of division: 1/12 - (-5/12) = 6/12 = 1/2

2^(1/2) = sqrt(2)

>> No.2159480

>>2159400
>>2159416

Brilliant. Thanks bros. I'll work it out. Very much appreciated!

Yeah, this is very basic, but I'm doing some work on my own to prepare for some stuff I have to do in the spring.