[RESOLVED] Help!

What does Ia - bI means? (Note: I <<< is a line, not I)

Thanks. :)

|a-b|
Absolute value of (a-b)

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Originally Posted by Logophobic

|a-b|
Absolute value of (a-b)

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So, if a = (-2,1) and b = (4,6), how do I use the 2 given values to solve by using |a-b|? Can show me the steps? Thanks. :)

Someone help me please?

Well, if a and b are vectors then |a - b| then this absolute value is to be understood as the modulus of their difference.

If a = (a₁,a₂) and b = (b₁,b₂) then,

|a - b| = Sqr{(a₁ - b₁)² + (a₂ - b₂)²}

Quote:

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Originally Posted by Yunie

So, if a = (-2,1) and b = (4,6), how do I use the 2 given values to solve by using |a-b|? Can show me the steps? Thanks. :)

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|a - b| = Sqr(61)

Hey thanks krtxmrtz!!! :) :thumb:

Quote:

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Originally Posted by Yunie

Hey thanks krtxmrtz!!! :) :thumb:

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No problem.
You're welcome to rate my post ;)

Quote:

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Originally Posted by Yunie

So, if a = (-2,1) and b = (4,6), how do I use the 2 given values to solve by using |a-b|? Can show me the steps? Thanks. :)

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If you're looking for the absolute value of the distance between the two points, then krtxmrtz's answer was indeed correct. However, if you're just looking for the new point, it's simple subtraction. (-2,1) - (4,6) = (-6, -5), and the absolute value of that would be (6,5).

Note that |a-b| is distinctly different from |a| - |b|.

Quote:

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Originally Posted by krtxmrtz

No problem.
You're welcome to rate my post ;)

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I have rated your post. Thanks. ;)

Quote:

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Originally Posted by timeshifter

If you're looking for the absolute value of the distance between the two points, then krtxmrtz's answer was indeed correct. However, if you're just looking for the new point, it's simple subtraction. (-2,1) - (4,6) = (-6, -5), and the absolute value of that would be (6,5).

Note that |a-b| is distinctly different from |a| - |b|.

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I see I see...Thanks for telling that. :)