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October 21, 2025, 08:52:57 pm
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Author Topic: sigh... vectors!!!  (Read 894 times)  Share 

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1MIN

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sigh... vectors!!!
« on: April 25, 2014, 05:39:58 pm »
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i'm sure many are hating vectors right now... but please help!!!
6g) that's all

thanks
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alchemy

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Re: sigh... vectors!!!
« Reply #1 on: April 25, 2014, 10:07:41 pm »
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The question in this thread is very similar: Re: it's so hard :(
Read it. Work it out. Post your steps if you get stuck (:
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bts

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Re: sigh... vectors!!!
« Reply #2 on: April 25, 2014, 10:16:28 pm »
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Let P (xi + yj)
XP . XZ = 0
XP = (-3+x)i +(-5+y)j
XZ = (3i - 5j)
[(-3+x)i +(-5+y)j] . (3i - 5j) = 0
-9 + 3x +25 -5y = 0 (1)

i'm not sure what to do next :( this problem looks tricky...
« Last Edit: April 25, 2014, 10:23:01 pm by bts »
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1MIN

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Re: sigh... vectors!!!
« Reply #3 on: April 26, 2014, 10:45:20 am »
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yes... please help... i don't get it those are the steps similar to me
whats the other equation for simulatneous equations?
I said PZ = k YZ (cause it needs to be colinear to it?) but then i'm introducing another variable and another equation is needed if i have to work it out simultaneously...
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