$\"\"$

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The vector is $\"\"$ .

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The standard form of the vector is $\"\"$ .

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Compare the vector with general form.

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$\"\"$ and $\"\"$ .

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Magnitude of the vector $\"\"$ .

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Substitute $\"\"$ and $\"\"$ .

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$\"\"$

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Magnitude of the vector is $\"\"$ .

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$\"\"$

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Magnitude of the vector is $\"\"$ .