Calculate the cross product assuming that u×w=⟨−4,−4,1⟩ (−u−3w)×w=
Question
Calculate the cross product assuming that u×w=⟨−4,−4,1⟩
(−u−3w)×w=
Solution
To calculate the cross product of (-u - 3w) and w, we can use the properties of the cross product.
The cross product is distributive over addition and scalar multiplication, so we can write:
(-u - 3w) × w = -u × w - 3w × w
We know that u × w = ⟨−4,−4,1⟩, so -u × w = -⟨−4,−4,1⟩ = ⟨4,4,-1⟩.
The cross product of any vector with itself is the zero vector, so w × w = ⟨0,0,0⟩.
Therefore, (-u - 3w) × w = ⟨4,4,-1⟩ - 3⟨0,0,0⟩ = ⟨4,4,-1⟩.
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