math homework

find a unit vector in the direction of u
u = (-5, -12, 9)

a. (-5, -12, 9)
b. 1 / squareroot 26 (-5, -12, 9)
c. squareroot 26 (-5, -12, 9
d. 1/ 5 squareroot 10 (-5, -12, 9)
e. 1/ 5 squareroot 10 (5, 12, -9)

  1. 0
  2. 0
  3. 3
asked by lottie
  1. 5^2 + 12^2 + 9^2 = 250
    length = sqrt 250 = 5 sqrt 10

    so
    (1 / 5sqrt10) (-5,-12,9)

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    2. 0
    posted by Damon

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