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If ` vec a ,\ vec b ,\ vec c` are three vectors such that ` vec a. vec b= vec a.\ vec c` and ` vec a\ xx\ vec b= vec a\ xx\ vec c ,\ vec a\ !=0` , then show that ` vec b= vec c` .

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XII BOARD PREVIOUS YEAR PAPER ENGLISH-BOARD PAPER SOLUTIONS-All Questions
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