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[" 10.If "vec a=hat imath+hat jmath,vec ...

[" 10.If "vec a=hat imath+hat jmath,vec b=hat 1-hat j" and "vec c=hat imath+2hat jmath+3hat k," if "n" is a unit vector "],[" such that "vec a*vec n=0" and "vec b*vec n=0," then show that "vec c*vec n=3]

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