Question: Le a = i + 2j - k, b = j + k, and c = -i + j + 2k. Find the each of

Le a = i + 2j - k, b = j + k, and c = -i + j + 2k.
Find the each of following:
a. a ∙ b
b. (a + c) ∙ b
c. a / ||a||
d. (b - c) ∙ a
e. a ∙ b / ||a|| ||b||
f. b ∙ b - ||b||2

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