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Calcmathlete
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Let the solution (x, y, z) satisfy the following equations: x + y + z = 1, xy + xz + yx = 17, xyz = 15. If x < y < z, what is the value of: x  2y + 4z?
 2 years ago
 2 years ago
Calcmathlete Group Title
Let the solution (x, y, z) satisfy the following equations: x + y + z = 1, xy + xz + yx = 17, xyz = 15. If x < y < z, what is the value of: x  2y + 4z?
 2 years ago
 2 years ago

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Calcmathlete Group TitleBest ResponseYou've already chosen the best response.0
And this is supposed to be a speed math question as in you should be able to do this in like 30 seconds...not sure how to do it though...
 2 years ago

NotTim Group TitleBest ResponseYou've already chosen the best response.0
its also...vector like...
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.0
Seriously? That's like 5 questions that pertain to vectors when I have not learned them... :/
 2 years ago

swissgirl Group TitleBest ResponseYou've already chosen the best response.2
well for starter the biggest lead is xyz=15 that shows me that there has to be a 1,3 and 5 involved
 2 years ago

swissgirl Group TitleBest ResponseYou've already chosen the best response.2
next x+y+z=1 5+3+1=1
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.0
But when you plug it into xy + xz + yx, it doesn't work...
 2 years ago

Hero Group TitleBest ResponseYou've already chosen the best response.0
I think that also fails the x < y < z
 2 years ago

Hero Group TitleBest ResponseYou've already chosen the best response.0
since in your case y > z
 2 years ago

swissgirl Group TitleBest ResponseYou've already chosen the best response.2
well no u wld just switch around the variables that is no big deal
 2 years ago

Hero Group TitleBest ResponseYou've already chosen the best response.0
Maybe let x = 5, y = 1, z = 3
 2 years ago

KingGeorge Group TitleBest ResponseYou've already chosen the best response.1
Did you mistype the problem? Or is it correct as written? Should it be "xy + xz + yz = 17" instead of "xy + xz + yx = 17?"
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.0
That's what it says on the document...thinking it's a typo though...
 2 years ago

Calcmathlete Group TitleBest ResponseYou've already chosen the best response.0
Alright. I think it is just a typo. Thanks swiss!
 2 years ago
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