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The points (0, −1, −1), (−4, 4, 4), (4, 5, 1) and (3, 9, 4) are (A) Collinear (B) Coplanar

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The points (0, −1, −1), (−4, 4, 4), (4, 5, 1) and (3, 9, 4) are 

(A) Collinear 

(B) Coplanar 

(C) Forming a square 

(D) None of these

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Answer is (B) Coplanar

Equation of the plane passing through the points (0, -1, -1), (-4, 4, 4) and (4, 5, 1)

5x - 7y + 11z + 4 = 0 (1) 

The point (3, 9, 4) satisfies Eq. (1).

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