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Who can rise to the arithmetic challenge?
    #15824579 -

True or false:

(3t2 + 5)(t2 - 7t + 2) + (t3 + 5t)(2t - 7)

is equivalent to

5t4 -


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Re: Who can rise to the arithmetic challenge? [Re: Liverwort]
    #15824593 -

well i have a 50-50 chance here....

true:ifyoucanawe:


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Re: Who can rise to the arithmetic challenge? [Re: Salomon]
    #15824601 -

True, obviously


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When you’re lost, here I am. Forever with your soul


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Re: Who can rise to the arithmetic challenge? [Re: King Klick]
    #15824662 -

Physics challenge!!!!!!!!!!!

A proton (q = 1.6 X 10-19 C, m = 1.67 X 10-27 kg) moving with constant velocity enters a region containing a constant magnetic field that is directed along the z-axis at (x.,y) = (0,0) as shown. The magnetic field extends for a distance D = 0.43 m in the x-direction. The proton leaves the field having a velocity vector (vx, vy) = (4 X 105 m/s, 2.1 X 105 m/s).

What is R, the radius of curvature of the motion of the proton while it is in the region containing the magnetic field?


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Re: Who can rise to the arithmetic challenge? [Re: Salomon]
    #15824700 -

Salomon said:
well i have a 50-50 chance here....

true:ifyoucanawe:


I say false.


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Re: Who can rise to the arithmetic challenge? [Re: RonaldFuckingPaul]
    #15824704 -

I say potato

:ifyoucanawe:

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Re: Who can rise to the arithmetic challenge? [Re: G-Cotty]
    #15824707 -

Haha sorry i was gonna post this, but then I figured out how to punch it into wolframalpha.com .

I never finished typing it out here and it somehow published the incomplete post. I'll finish it up for kicks, if anyone wants to try the challenge, but I'm gonna rephrase it.


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Re: Who can rise to the arithmetic challenge? [Re: G-Cotty]
    #15824715 -

5*t^4-28*t^3+21*t^2-70*t+10


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Re: Who can rise to the arithmetic challenge? [Re: Liverwort]
    #15824722 -

Here is the modified arithmetic challenge:

(3t2 + 5)(t2 - 7t + 2) + (t3 + 5t)(2t - 7)

What you have to do is rephrase it so there are no parenthesis. In other words, put it in completely seperated terms that are being added to (or subtracted from) each other.


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Re: Who can rise to the arithmetic challenge? [Re: Liverwort]
    #15824730 -

Hell yeah, you got it before I could even finish rephrasing it! Hats off to you, qbe. You are a skilled arithmetician!


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Re: Who can rise to the arithmetic challenge? [Re: Liverwort]
    #15824759 -

(3t2 + 5)(t2 - 7t + 2) + (t3 + 5t)(2t - 7)
=/=
5t4

False.

I think I did it right but I am way too lazy to actually go through the steps here. :lol:


EDIT:
Dammit, someone beat me to it while I was figuring it out. :sad:


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Edited by Meteloides (02/17/12 06:56 PM)

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Re: Who can rise to the arithmetic challenge? [Re: Liverwort]
    #15824774 -

zappateer said:
True or false:

(3t2 + 5)(t2 - 7t + 2) + (t3 + 5t)(2t - 7)

is equivalent to

5t4 -



The quickest way to see that its false, without doing any arithmetic at all, is to note that 'answer' is only t to the fourth power.  In the expression you have terms of many powers, thus they are not equivalent.

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Re: Who can rise to the arithmetic challenge? [Re: Meteloides]
    #15824780 -

Yeah, qbe's pretty good. But I had to rephrase it anyway, so it was no longer a true/false question. Maybe I'll post another challenge in the future.. haha


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Re: Who can rise to the arithmetic challenge? [Re: Liverwort]
    #15824801 -

Haha, bring it on. Helping people with homework/challenges on the shroomery is my way of studying for college.


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Re: Who can rise to the arithmetic challenge? [Re: qbe]
    #15824817 -

What do you study dude?


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Re: Who can rise to the arithmetic challenge? [Re: Liverwort]
    #15824850 -

Bio-mechanical and Human performance engineering. How about you man?


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Edited by qbe (02/17/12 07:18 PM)

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Re: Who can rise to the arithmetic challenge? [Re: qbe]
    #15824906 -

Wow, that sounds really interesting. I'm an undergrad studying biology.


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Re: Who can rise to the arithmetic challenge? [Re: Liverwort]
    #15824918 -

So you're along the same lines as me. I'm an undergrad also, it's kinda like human biology and mechanical engineering smashed together.


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Re: Who can rise to the arithmetic challenge? [Re: qbe]
    #15824938 -

qbe said:
Bio-mechanical and Human performance engineering. How about you man?


can you make me one of those human exo-skeletons so i can throw cars and stuff?:gameover:


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Re: Who can rise to the arithmetic challenge? [Re: Liverwort]
    #15824939 -

Could you plug any number in for t and solve?


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