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June 17, 2024, 03:46:13 am
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Author Topic: Bazza's 3/4 Question Thread  (Read 21422 times)  Share 

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WhoTookMyUsername

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Re: Bazza's 3/4 Question Thread
« Reply #60 on: June 20, 2012, 08:49:38 pm »
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was tech free D:
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b^3

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Re: Bazza's 3/4 Question Thread
« Reply #61 on: June 20, 2012, 08:50:21 pm »
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Quote from: Somye on June 20, 2012, 08:37:41 pm
ps. the answer in the sac was

If that was the answer was the question instead of , the first one will give the answer with the negative in it? Which would also explain why bazza thought I had my u and v the other way round?
 
EDIT: wait, that swaps the powers of x+1 and x-1 aswell...
« Last Edit: June 20, 2012, 08:52:16 pm by b^3 »
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paulsterio

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Re: Bazza's 3/4 Question Thread
« Reply #62 on: June 20, 2012, 08:52:08 pm »
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Quote from: Bazza16 on June 20, 2012, 08:49:38 pm
was tech free D:

Of course, but I'm saying now that you know the answer, you can do this :P
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WhoTookMyUsername

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Re: Bazza's 3/4 Question Thread
« Reply #63 on: June 20, 2012, 08:52:40 pm »
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Quote from: b^3 on June 20, 2012, 08:50:21 pm
Quote from: Somye on June 20, 2012, 08:37:41 pm
ps. the answer in the sac was

If that was the answer was the question instead of , the first one will give the answer with the negative in it? Which would also explain why bazza thought I had my u and v the other way round?
 
EDIT: wait, that swaps the powers of x+1 and x-1 aswell...
Quote from: paulsterio on June 20, 2012, 08:52:08 pm
Quote from: Bazza16 on June 20, 2012, 08:49:38 pm
was tech free D:

Of course, but I'm saying now that you know the answer, you can do this :P

i don't even know the question :'(
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Somye

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Re: Bazza's 3/4 Question Thread
« Reply #64 on: June 20, 2012, 09:13:38 pm »
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OH! now i remember, the question was 1-x and 1+x
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WhoTookMyUsername

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Re: Bazza's 3/4 Question Thread
« Reply #65 on: June 20, 2012, 09:18:38 pm »
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put that into calc, that's what i got D:

so was sac wrong?
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Somye

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Re: Bazza's 3/4 Question Thread
« Reply #66 on: June 20, 2012, 09:29:31 pm »
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since I suck at latex and would take too long to type, here's a photo of my solution in the SAC
(sorry for the sucky handwriting)

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WhoTookMyUsername

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Re: Bazza's 3/4 Question Thread
« Reply #67 on: June 20, 2012, 09:31:02 pm »
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pop it in your cas somye, what did you get?
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WhoTookMyUsername

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Re: Bazza's 3/4 Question Thread
« Reply #68 on: June 20, 2012, 09:32:55 pm »
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unless i've done something wrong it's putting the answer i've got D:
not sure where you've gone wrong though (if you have)
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b^3

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Re: Bazza's 3/4 Question Thread
« Reply #69 on: June 20, 2012, 09:59:33 pm »
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Quote from: Bazza16 on June 20, 2012, 09:32:55 pm
unless i've done something wrong it's putting the answer i've got D:
not sure where you've gone wrong though (if you have)
It looks right, I did it my way and got the same answer as Somye, the thing that is different from that is that its not , but instead which may be why we were having the problems before.

EDIT: bad wording, fixed
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WhoTookMyUsername

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Re: Bazza's 3/4 Question Thread
« Reply #70 on: June 21, 2012, 07:06:32 am »
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But CAS!
GVe the same answer that i had ( slightly different form ) D:
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pi

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Re: Bazza's 3/4 Question Thread
« Reply #71 on: June 21, 2012, 03:38:24 pm »
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The CAS can't always give the most simplified form.
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WhoTookMyUsername

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Re: Bazza's 3/4 Question Thread
« Reply #72 on: June 21, 2012, 03:50:24 pm »
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nah i know that

but my answer (and cas when simplified) had (1+x) ^ 3/2
instead of just (1+x)

down the bottom
« Last Edit: June 21, 2012, 04:08:26 pm by Bazza16 »
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Phy124

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Re: Bazza's 3/4 Question Thread
« Reply #73 on: June 21, 2012, 04:42:03 pm »
+1
Quote from: Bazza16 on June 21, 2012, 03:50:24 pm
nah i know that

but my answer (and cas when simplified) had (1+x) ^ 3/2
instead of just (1+x)

down the bottom
Sort of confused about what you guys are trying to get at with this :P

But if you're answer had (1+x)3/2 in the denominator then maybe you had   ? (not sure if you already knew this or?  ::))

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WhoTookMyUsername

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Re: Bazza's 3/4 Question Thread
« Reply #74 on: June 21, 2012, 04:48:01 pm »
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OH
Wow
jeez i'm dumb
fml
so i would get full marks for that question
but in the next one i sort of skirted over the fact the derivative i got wasn't what i expected (worked backwards essentially), so may lose 1 there
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