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Homework help....2.0
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RoseBlood



Joined: 21 Apr 2008
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PostPosted: Fri Aug 29, 2008 3:01 pm    Post subject: Reply with quote

yes, grandpa.
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Asa



Joined: 10 Apr 2008
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Location: Grammar Police HQ. Watch your language, I'm armed with the NYTimes Style Book AND Strunk and White!

PostPosted: Fri Aug 29, 2008 4:02 pm    Post subject: Reply with quote

My uni sells copies to students for five bucks. ^_^ I've got a home copy!
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thespaceinvader



Joined: 23 Mar 2008
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Location: Cardiff, UK

PostPosted: Fri Aug 29, 2008 4:11 pm    Post subject: Reply with quote

:O

It costs like 700 a copy o_O

But i guess they use a single educational licence to cover the distribution.
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Tamir



Joined: 22 Mar 2008
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PostPosted: Sat Aug 30, 2008 1:23 pm    Post subject: Reply with quote

RoseBlood wrote:
I hope you guys remember your high school pre-calc. I'm gonna need you this year.

(sometimes I forget how OLD you guys are.)

Don't worry, we're not all geezers. Razz I'll be happy to help.
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Nem



Joined: 14 Apr 2008
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Location: England

PostPosted: Sat Aug 30, 2008 1:35 pm    Post subject: Reply with quote

Some of us didn't do any maths at school either Razz But sure I can chip in.
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Asa



Joined: 10 Apr 2008
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Location: Grammar Police HQ. Watch your language, I'm armed with the NYTimes Style Book AND Strunk and White!

PostPosted: Sun Aug 31, 2008 12:06 am    Post subject: Reply with quote

And like you suspected, some of us forgot it already, even though we did learn college business calc, Tamir!

And space, I looked a little more closely at the disk i got from uni, and it says 'effective until April 2009'. Does that mean it'll stop working after that point and that it's an educational license?
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Nem: "It's the sort of face you just know is getting ready to poke you with something sharp."
BS: "...then insist you eat a brownie."
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Lithrath



Joined: 14 Apr 2008
Posts: 317
Location: Reading over your shoulder. Or Toronto.

PostPosted: Sun Aug 31, 2008 12:48 am    Post subject: Reply with quote

It'll probably ask you to update the registy key. My school does that for anti-virus software and the Office suite (essentially at the expiry date it brings up a window like the one you had when you first installed it, you type in the new key and away you go. It still reads stuff when it expires, you just can't edit it).

As for calc help Red, I apologize; I'm an algebra and geometry type. ^^0
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Nem



Joined: 14 Apr 2008
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Location: England

PostPosted: Mon Nov 24, 2008 3:44 pm    Post subject: Reply with quote

So someone's been trying to convince me that 1+0=0, which I am, sceptical of, to say the least. As far as I can see there's some arbitrary bracket insertion to an infinite series going on which I'm not sure is an entirely legal move; but since the last maths course I took was a rudimentary high school class it seems worth checking with the more maths inclined folks.

So anyway their claim goes like this:

(1+1) - (0+1) = 1

1-1=0

1+1+1+1+1+1+1..ad infinity - (1+1+1+1+..ad infinity)=0

1+(1+1+1+1+1.. ad infinity)- (1+1+1+1+1+1+1...)=0

1+(1+1+1+1+1...)+0=(1+1+1+1+1+...) /subtract (1+1+1+1+..) from both sides)

1+0=0

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And my response goes like this:

(1 + 1...) - (1 + 1...) = 0

0 + 1
= (1 + 1...) - (1 + 1...) + 1
= 1 + ( 1 + 1 ...) - ( 1 + 1 ...)
= 1

Is there something I'm missing?
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Tamir



Joined: 22 Mar 2008
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Location: Israel

PostPosted: Mon Nov 24, 2008 4:14 pm    Post subject: Reply with quote

Nem wrote:
1+1+1+1+1+1+1..ad infinity - (1+1+1+1+..ad infinity)=0

The minute they stuck that "ad infinity" there, the equation already doesn't hold. The equation I quoted could equal any integer I want it to, similar to the way he made it equal zero. Infinities are evil like that. In general, an expression of that sort yields an undefined result.
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theBSDude



Joined: 09 Jul 2008
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PostPosted: Mon Nov 24, 2008 11:12 pm    Post subject: Reply with quote

Yeah, Inifinty minus Infinity is always undefined.
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electricpanda



Joined: 03 Sep 2008
Posts: 608
Location: Smelbourne

PostPosted: Tue Nov 25, 2008 4:07 am    Post subject: Reply with quote

Orrr, 1+0 = 1 because can't you use your fingers. Sillyface. It's like saying down = up. Or something.

Seriously, I fail at maths but even I can tell that 0+1=1.

Because if there are no cakes on the table, and then someone puts one cake on the table, that means there is, in all likelihood, one cake on the table.
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theBSDude



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PostPosted: Tue Nov 25, 2008 3:05 pm    Post subject: Reply with quote

Ehh... 0.9 repeating equals 1.
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Tamir



Joined: 22 Mar 2008
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PostPosted: Tue Nov 25, 2008 4:56 pm    Post subject: Reply with quote

True, but what does that have to do with anything? o_0
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electricpanda



Joined: 03 Sep 2008
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PostPosted: Wed Nov 26, 2008 3:21 am    Post subject: Reply with quote

Yeah, but that's because it's rounded up.

I think.
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Tamir



Joined: 22 Mar 2008
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PostPosted: Wed Nov 26, 2008 7:38 am    Post subject: Reply with quote

No, it equals one with no rounding.
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