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1.11 Vectors

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Question 42

In triangle DEFDEFDEF, DE⃗=1i−2j+2k\vec{DE} = 1\mathbf{i} - 2\mathbf{j} + 2\mathbf{k}DE=1i−2j+2k, DF⃗=3i+4j−k\vec{DF} = 3\mathbf{i} + 4\mathbf{j} - \mathbf{k}DF=3i+4j−k

a.

Find the vector EF⃗\vec{EF}EF

[3]
b.

Find the length of the line DEDEDE

[3]

1.11 Vectors Questions

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