може скалярний добуток?а(-5;5;-5) b(4;11;-5)= -5*4 + 5*11 + (-5*-5)= -20+55+25=60
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може скалярний добуток?
а(-5;5;-5) b(4;11;-5)= -5*4 + 5*11 + (-5*-5)= -20+55+25=60