Tricky P1 Maths Questions (debatable)

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Bhaal85
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#41
Report 18 years ago
#41
(Original post by Ralfskini)
Yes. I do know a lot about maths. And I would expect you to know that you cant just turn something into a function for convenience, nor can you assume it is equal to 0. Those assertions wont help
I know :rolleyes: Could you explain how you got the answer, because I dont think I can do this, DAMN!!!
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BABYGUY
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#42
Report Thread starter 18 years ago
#42
one other little query.

if you have: 3 < -3x
does this become: -1 > x

the sign does reverse in this situation, correct?
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Bhaal85
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#43
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#43
(Original post by BABYGUY)
one other little query.

if you have: 3 < -3x
does this become: -1 > x

the sign does reverse in this situation, correct?
yes.
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elpaw
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#44
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#44
(Original post by BABYGUY)
one other little query.

if you have: 3 < -3x
does this become: -1 > x

the sign does reverse in this situation, correct?
yes
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elpaw
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#45
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#45
(Original post by Bhaal85)
****!!! I dont think I can do this, my mind is in a block at the moment, could somebody, anybody show how they did that.
I'll just write it out in Word, copy and paste into paint, save as jpeg, and you'll see the result in like 5 minutes.... brb
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Bhaal85
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#46
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#46
(Original post by elpaw)
I'll just write it out in Word, copy and paste into paint, save as jpeg, and you'll see the result in like 5 minutes.... brb
Thanks Elpaw.
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elpaw
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#47
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#47
(Original post by Bhaal85)
Thanks Elpaw.
Here it is:

http://users.ox.ac.uk/~chri1957/surd.gif
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Bhaal85
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#48
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#48
(Original post by elpaw)
Here it is:

http://users.ox.ac.uk/~chri1957/surd.gif
Why 5+3root2 as opposed to 5-3root2???
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elpaw
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#49
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#49
(Original post by Bhaal85)
Why 5+3root2 as opposed to 5-3root2???
because (a+b)(a-b) = a² - b², with no terms in ab. (ie you leave the terms with rt 2 out, and (rt 2)² = 2. so no roots in the denominator.
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BABYGUY
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#50
Report Thread starter 18 years ago
#50
*******!!! i got that ***** before!!!! thing is, u cant leave it in that form, it has to be in p + q(root2)..............so.

2- 3(root2) ---------->
-----------
7


2/7 - 3/7(root2)

correctumondo???? i bloody got this in the first place, and i messed about with it to get it into the form p + q(root2)
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Unregistered
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#51
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#51
(Original post by Bhaal85)
Are you taking the p***???

2-(5x+2) = -5x
I think 'babyguy' is our resident p.... taker who sets maths questions every night and then winds up our forum mathematicians. The form of communication is always the same. Ignore it!!!
P.
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elpaw
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#52
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#52
(Original post by BABYGUY)
*******!!! i got that ***** before!!!! thing is, u cant leave it in that form, it has to be in p + q(root2)..............so.

2- 3(root2) ---------->
-----------
7


2/7 - 3/7(root2)

correctumondo???? i bloody got this in the first place, and i messed about with it to get it into the form p + q(root2)
it is the same thing. just for clarity, i have updated it: http://users.ox.ac.uk/~chri1957/surd.gif
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Ralfskini
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#53
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#53
(Original post by BABYGUY)
*******!!! i got that ***** before!!!! thing is, u cant leave it in that form, it has to be in p + q(root2)..............so.

2- 3(root2) ---------->
-----------
7


2/7 - 3/7(root2)

correctumondo???? i bloody got this in the first place, and i messed about with it to get it into the form p + q(root2)
yeh but it IS in the form p + q, p = 2/7 and q = -3/7
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Bhaal85
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#54
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#54
(Original post by elpaw)
I'll just write it out in Word, copy and paste into paint, save as jpeg, and you'll see the result in like 5 minutes.... brb
AHHHHHHHHHH!!!!!!!! I see what I did wrong. I treated (4-3(root2)) as (4) and (-3root2) as seperate things.

Cheers Elpaw.
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Juwel
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#55
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#55
(Original post by Bhaal85)
AHHHHHHHHHH!!!!!!!! I see what I did wrong. I treated (4-3(root2)) as (4) and (-3root2) as seperate things.

Cheers Elpaw.
Duuuuuh!
Just playing!
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BABYGUY
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#56
Report Thread starter 18 years ago
#56
i know, i got the exact same answer as before...but i tell you hat i tried to do:

ok, got
2 - 3(root2)
------------
7

i then tried to get rid of the 7 in the denominator, by doing this:

7(2 - 3root2)..........but of course *******ed ***** you dont do that...........

answer: 2/7 -3/7(root2)

and just leave it at that ******.........why bother messing with it.
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elpaw
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#57
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#57
(Original post by BABYGUY)
i know, i got the exact same answer as before...but i tell you hat i tried to do:

ok, got
2 - 3(root2)
------------
7

i then tried to get rid of the 7 in the denominator, by doing this:

7(2 - 3root2)..........but of course *******ed ***** you dont do that...........

answer: 2/7 -3/7(root2)

and just leave it at that ******.........why bother messing with it.
some people take offence to the word ****. RE: Seer a few weeks back.
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Juwel
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#58
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#58
(Original post by elpaw)
some people take offence to the word ****. RE: Seer a few weeks back.
Why, what happened there?
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elpaw
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#59
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#59
(Original post by ZJuwelH)
Why, what happened there?
see: http://www.uk-learning.net/showthread.php?t=11750
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BABYGUY
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#60
Report Thread starter 18 years ago
#60
i think some people should get a life. seer's comments were very funny and he backed them up well when he had to. its not his fault that the geeks were toilet at football.
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