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10. If A = 2i – 2j and B = 2k, then A.B = ___ |
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Answer» ik=jk Explanation: A=2i-2j B=2K (2i-2j)(2k) 2i2k-2j2k=0 2(IK)-2(jk)=0 2(ik)=2(jk) ik=jk |
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