[ (m - n)3 + (n - r)3 + (r - m)3 ] / 6[(m - n) (n - r) (r - m)] = ? – McqOptions

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1.	[ (m - n)³ + (n - r)³ + (r - m)³ ] / 6[(m - n) (n - r) (r - m)] = ?
A.	1/2
B.	1/3
C.	1/5
D.	1/6
Answer» B. 1/3

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