$\"\"$

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The magnitude of the vector is $\"\"$ .

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Find the value of $\"\"$ .

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Consider $\"\"$ .

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Rewrite the expression.

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$\"\"$ .

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Substitute $\"\"$ .

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$\"\"$ .

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Therefore, the value of $\"\"$ is $\"\"$ .

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$\"\"$

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The value of $\"\"$ is $\"\"$ .