Question: Three points A, M, N lie on a straight line.

January 20 2012 toandhsp 240

Please write a code for me about following problem.

Let A(0,1,2) be a point and two lines

d1: x/2 = (y-1)/1 = (z+1)/(-1)

d2: x = 1 + t, y = -1 + 2t, 2 + t.

Find the coordinates of the point M lie on line d1 and the point N lie on line d2 of the line so that the three points A,M, N lie on a straight line. Thank you vety much. 

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