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[" OR./ Find the shortest distance between the lines whose vector equations are "],[vec r=(hat i+2hat j+3hat k)+lambda(hat i-3hat j+2hat k)" and "vec r=4hat i+5hat j+6hat k+mu(2hat i+3hat j+hat k)],[" 13.A diet is to contain at least "80" units of vitamin "A" and "100" units of minerals.Two foods "]

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