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Find `| -> a|` and `| -> b|` , if `( -> a+ -> b)dot( -> a- -> b)=8` and `| -> a|=8| -> b|`

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CENGAGE ENGLISH-VECTOR ALGEBRA-All Questions
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  3. Find | -> a| and | -> b| , if ( -> a+ -> b)dot( -> a- -> b)=8 an...

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