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(1)a){:[ vec(a)=2 hat(ı)-2 hat(ȷ)+3 hat(k)],[2 vec(b)=2 hat(ı)+6 hat(ȷ)+8 hat(k)],[3 vec(c)=9 hat(ı)+10 hat(ȷ)+12 hat(k)],[ vec(a)+2 vec(b)+3 vec(c)=13 hat(ı)+22 hat(ȷ)+23 hat(k)],[=(13","22","23)]:}b) vec(a)* vec(b)=|a||b|cos theta or a*b" here, "{:[ vec(a)* vec(b)=(2)(1)-(2)(3)+(3)(4)],[=(2-6+12)]:}c) bar(a)xx vec(b)=|[ ... See the full answer