1. $2\stackrel{\rightharpoonup }{j}+3\stackrel{\rightharpoonup }{j}+\stackrel{\rightharpoonup }{k},3\stackrel{\rightharpoonup }{j}+\stackrel{\rightharpoonup }{j}-2\stackrel{\rightharpoonup }{k}$

• A. $-7$
• B. $-7$
• C. $-7$
• D. $-7$

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