Friday
April 18, 2014

Homework Help: Math

Posted by Anonymous on Saturday, March 29, 2008 at 4:29pm.

If a = 3i + 2j - k and b = -2i + j calculate each magnitude.

a) a + b
I got sqrt3, but the answer at the back of the book says sqrt11.

2) If D(3,4,5) and E(-2,1,5) are points in space calculate each expression and state what it represents.
|OD|

can you please do those and explain steps.

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