1.

(m-a^2)/(b^2+c^2 )+(m-b^2)/(c^2+a^2 )+(m-c^2)/(a^2+b^2 )=3, then the value of n is

A. A^2+b^2+c^2
B. A^2+b^2-c^2
C. A^2+b^2
D. A^2-b^2-c^2
Answer» B. A^2+b^2-c^2


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