Mathematics, 15.01.2021 23:50 iris7324

9. The vectors a, b, and c are the position vectors of three points A, B, and C. Show that r = pa + sb + tc, where p+s+ t = 1 is an equation of the plane containing these three points.

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9. The vectors a, b, and c are the position vectors of three points A, B, and C. Show that r = pa +...