Vectors Flashcards

1
Q

If x=(x1,x2,…,xn), y=(y1,y2,…,yn) What is x · y?

A

x1 y1 + x2 y2 + … + xn yn

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2
Q

Which is true?

x · y = y · x

or

x · y = - y · x

A

x · y = y · x

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3
Q

x · (y + z) = ?

A

x · y + x · z

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4
Q

(αx) · y =

A

α(x · y) = x · (αy)

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5
Q

0 · x =

A

0

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6
Q

x · x ≥ ?

A

x · x0

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7
Q

x · x =

A

x · x = ‖x2

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