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Author Topic: subtle convention  (Read 1359 times)

vh

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subtle convention
« on: May 16, 2013, 12:34:39 PM »
|-2|-3|+4| = 2
|-2|-3|4| = -10

(and this is why abs() is better)

atomic7732

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Re: subtle convention
« Reply #1 on: May 16, 2013, 03:21:40 PM »
wtf why wouldn't it just be

+|4|

vh

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Re: subtle convention
« Reply #2 on: May 16, 2013, 03:39:34 PM »
ok then you pony

|-2|-3|+4x| = |-6+4x|
|-2|-3|4x| = 2-12x

FiahOwl

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Re: subtle convention
« Reply #3 on: May 16, 2013, 05:01:23 PM »
I was taught that |-4||-4|+|-2|=14?????

vh

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Re: subtle convention
« Reply #4 on: May 16, 2013, 05:15:05 PM »
no |x| means absolute magnitude so |-4| = 4

|-4||-4|+|-2| = 4*4+2 = 18

the problem i'm discussing in this thread is that

|a|-b|+c| = |(a|-b|)*c|
but
|a|-b|c| = |a|(-b*|c|)


FiahOwl

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Re: subtle convention
« Reply #5 on: May 16, 2013, 05:28:38 PM »
why the fuck did i say 14 i wanted to say 18

lol