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If the points (1, 1, -3) and (1, 0, -3) lie on opposite sides of the plane $x + y + 3 z + d = 0$ then

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d<7

d>8

d<7 or d>8

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detailed solution

Correct option is C

d-7 and d-8 must have opposite signs ⇒7

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If the points (1, 1, -3) and (1, 0, -3) lie on opposite sides of the plane x+y+3z+d=0 then

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Ready to Test Your Skills?

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If the points (1, 1, -3) and (1, 0, -3) lie on opposite sides of the plane $x + y + 3 z + d = 0$ then