1.

If →A⋅(→B+→C)=→B⋅(→C+→A)=→C⋅(→A+→B)=0 and |→A|=3,|→B|=4 and |→C|=5, then |→A+→B+→C|=

Answer»

If A(B+C)=B(C+A)=C(A+B)=0 and |A|=3,|B|=4 and |C|=5, then |A+B+C|=



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