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Q.

If the points (1,-1,1) and (-2,0,5) with respect to the plane 2x+3yz+7=0 lie on

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a

on the plane

b

opposite sides

c

same side

d

in side the plane

answer is A.

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Detailed Solution

Π111 =2(1)+3(1)1+7>0

Π222 = 2(2)+3(0)5+7<0

 Points lies on opposite sides of the plane

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If the points (1,-1,1) and (-2,0,5) with respect to the plane 2x+3y−z+7=0 lie on