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equation

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Source: — Problem Solving |
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Re: equation

by shahdevine » Sun Aug 09, 2009 5:50 am
mariah wrote:If r@s=s@r which of the following can define the equation?
1. r@s=r+s-rs
2. r@s=(r+s)(r-s)
3. r@s =r/s+ s/r
oa [spoiler]I & III[/spoiler]
question is asking you to assume r@s equals any of the definitions listed and then flip definition by replacing r with s and s with r wherever they may be and see if both those definition are equal.

1. r+s-rs=s+r-sr -->yes
2. r^2-s^2=s^2-r^2--> no
3. r/s+s/r=s/r+r/s -->yes

I&III

you got this man!
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