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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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#1 2012-12-24 01:05:31

BarandaMan
Guest

How to rearrange this?

Why does

((Pt)^(n-1))((Pi)^(1-n)) EQUAL the term ((Pi/Pt)^(1-n))? Apparantly these two are equivalent? I am not good at rearranging / how to change the signs on powers etc, can someone explain?

Thanks

#2 2012-12-24 06:36:56

muxdemux
Full Member

Offline

Re: How to rearrange this?

I just wrote


then did a bunch of algebra. Some things to remember while working it out:

and


Good luck!

#3 2012-12-24 13:56:03

BarandaMan
Guest

Re: How to rearrange this?

muxdemux wrote:

I just wrote


then did a bunch of algebra. Some things to remember while working it out:

and


Good luck!

Thank you! So based on the first rule you said, then (Pi/Pt)^(1-n) = (Pi^(1-n)(Pt)^(1-n)...which isn't the answer. Can you help??

#4 2012-12-24 15:13:01

muxdemux
Full Member

Offline

Re: How to rearrange this?

That's a start! Once you've got that, you should divide both sides by



Notice that



and you should be able to use that second rule I gave you.

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