If point D divides the base B C of a \triangle A B C in the ratio n: m, then the value of m B D^{2}+n C D^{2}+(m+n) A D^{2} is

Manipal Entrance Test 2020 Math Paper

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If point D divides the base BC of a △ABC in the ratio n:m, then the value of mBD2+nCD2+(m+n)AD2 is

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