- #1

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(a) u has the same direction as v = (6,7,-3)

(b) u is oppositely directed to v = (6,7,-3)

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- Thread starter dola
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- #1

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(a) u has the same direction as v = (6,7,-3)

(b) u is oppositely directed to v = (6,7,-3)

- #2

tiny-tim

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Hi dola! Welcome to PF!

Show us what you've tried, and where you're stuck, and then we'll know how to help!

Try (a) first.

- #3

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(a) u has the same direction as v = (6,7,-3)

(b) u is oppositely directed to v = (6,7,-3)

---->

Let, the terminal point of u is Q(x,y,z)

Thus u = vector PQ = (x+1, y-3, z+5)

(a) u will have the same direction as v

so, (x+1, y-3, z+5) = (6,7,-3)

x = 5, y = 10, z = -8

Thus one possible ans might be

(b) u will have the opposite direction as v

so, (x+1, y-3, z+5) = (-6,-7,3)

x = -7, y = -4, z = -2

Thus one possible ans might be

I am not sure whether the procedure is correct. Waiting for explanation

- #4

tiny-tim

Science Advisor

Homework Helper

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… I am not sure whether the procedure is correct. Waiting for explanation

Yup, that's fine … both method and result!

- #5

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Thank you

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