If three points a (- 2, - 2) B (0, m) C (n, 0) (Mn is not equal to 0) are collinear, What is 1 / M + 1 / N?
1/m+1/n=(m+n)/mn
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AB = (2, M + 2) BC = (n, - M) AC = (n + 2,2), and three points a (- 2, - 2) B (0, m) C (n, 0) (Mn is not equal to 0) are collinear,
Then (M + 2) (n + 2) = 4 - 2m = n (n + 2) primitive = - 1 / 2
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