设a=i+2j+3k,b=i+2j+k则a.b 设a=2i+j-4k,b=i-2j+3k,则a+b=

来源:学生作业帮助网 编辑:作业帮 时间:2024/03/28 21:47:28
设a=i+2j+3k,b=i+2j+k则a.b 设a=2i+j-4k,b=i-2j+3k,则a+b=

设a=i+2j+3k,b=i+2j+k则a.b 设a=2i+j-4k,b=i-2j+3k,则a+b=
设a=i+2j+3k,b=i+2j+k则a.b 设a=2i+j-4k,b=i-2j+3k,则a+b=

设a=i+2j+3k,b=i+2j+k则a.b 设a=2i+j-4k,b=i-2j+3k,则a+b=
设a=i+2j+3k,b=i+2j+k则a.b=1+2×2+3×1=8
设a=2i+j-4k,b=i-2j+3k,则a+b=3i-j-k