Question

show that the foot of perpendicular from origin to the join of A(-9,4,5) and B(11,0,-1) is midpoint of AB.

Answer 1

can someone help me!!

fast
its urgent

Answer 2

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Saifoo help me !!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 3

Use the distance rule. Calculate the distance from the origen to A (11.04) and the distance to B (11.04). Thus triangle OAB is isoceles and the result follows

Answer 4

Or use vectors and show that the vector from O to the midpoint is perpendicular to the vector from A to B.

Answer 5

thanks very much chr42 and rspencer