c4 vectors quick question

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c4 vectors quick question

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zabady

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c4 vectors quick question

« on: May 02, 2010, 06:46:44 pm »

i want part C

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astarmathsandphysics

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Free the exam papers!

Re: c4 vectors quick question

« Reply #1 on: May 02, 2010, 07:34:00 pm »

When i get home. On a phone now.

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T.Q

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Re: c4 vectors quick question

« Reply #2 on: May 02, 2010, 08:43:54 pm »

for part c

distance $PQ=\sqrt{90}$

$R= (1+3s)i + (4+s)j+(2)k$

so

distance $PR=\sqrt{10s^2 }$

PQ=PR

$\sqrt{90}=\sqrt{10s^2 }$

Squer both sides

$90=10s^2$

$s=\pm3$

now substitute S in L2

and find the coordinates

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