M and N are the mid points of the diagonals A C and B D respectively of quadrilateral A B C D , then A B → + A D → + C B → + C D → =

Question

M and N are the mid points of the diagonals A C and B D respectively of quadrilateral A B C D , then A B → + A D → + C B → + C D → =, 2 M N →, 2 N M →, 4 M N →, 4 N M →

MARKS App · Accepted Answer

A B - + A D - + C B - + C D - = … = b - - a - + d - - a - + b - - c - + d - - c - = 2 b - + d - - ( a - + c - ) = 4 b - + d - 2 - a - + c - 2 = 4 M N -

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