anonymous
  • anonymous
Find a vector that the same direction as −2i + 4j+ 2k but that has length 6.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
desperately waiting for ur reply...so fed up with this problem right now !!! help
anonymous
  • anonymous
hi guys
anonymous
  • anonymous
do share ur views on this plss

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anonymous
  • anonymous
i am new here, on this site, looks fun
anonymous
  • anonymous
surely it is !!! nothing lesser than a boon to the students !!! getting live help for free is just awesome
anonymous
  • anonymous
feels like v r a community sharing its knowledge
anonymous
  • anonymous
I am graduating highschool this spring
anonymous
  • anonymous
congrats bro !!!
anonymous
  • anonymous
the only bad thing is that me and my boyfriend are going to different universities :(
anonymous
  • anonymous
which uni r u in ?
anonymous
  • anonymous
Carnegie Mellon University
anonymous
  • anonymous
what degree wer u in ?
anonymous
  • anonymous
Computer Science, I know this sounds strange because I am a girl, but I LOVE computer science and programming
anonymous
  • anonymous
thats good.....computers r not just monopoly of boyzzz
anonymous
  • anonymous
:)
anonymous
  • anonymous
may i ask ur name ?
anonymous
  • anonymous
ankur, you still need an answer?
anonymous
  • anonymous
You just need to find the unit vector of u and multiply it by 6
anonymous
  • anonymous
ah got it !!! cheers !!!
anonymous
  • anonymous
Cool
nikvist
  • nikvist
\[|-2i+4j+2k|=\sqrt{(-2)^2+4^2+2^2}=2\sqrt{6}\] \[\vec{a}=\alpha(-2i+4j+2k)\quad,\quad\alpha=\frac{6}{2\sqrt{6}}=\frac{\sqrt{6}}{2}\] \[vec{a}=\frac{\sqrt{6}}{2}(-2i+4j+2k)=-\sqrt{6}i+2\sqrt{6}j+\sqrt{6}k\]
anonymous
  • anonymous
hey one more short question
anonymous
  • anonymous
?
anonymous
  • anonymous
unit vector that is perpendicular to the xz-plane
anonymous
  • anonymous
(1,0,0) lies in x, (0,0,1) lies in z, so (0,1,0) will lie in y which is perpendicular to xz.
anonymous
  • anonymous
@nikwist : could you please tell how do u type square roots like this on screen?
anonymous
  • anonymous
and it's a unit vector.
anonymous
  • anonymous
u r so intelligent !!! no wonder you have so many fans !!! thanx a lot again
anonymous
  • anonymous
np...fan me if you haven't :)
anonymous
  • anonymous
i have...do u have any idea how nikwist wrote his answers like that above?
anonymous
  • anonymous
Yes, go into equation editor below, and there's a set of boxes to the right you can use. You can also type, sqrt{x} directly into the equation line to get\[\sqrt{x}\]
anonymous
  • anonymous
cheers !!! u r really a lifesaver
anonymous
  • anonymous
np :D

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