Three vertices of a parallelogram PQRS are P(3, - 1, 2), Q (1, 2, - 4) and R (- 1, 1, 2). Find the coordinates of the fourth vertex.

(-1,-2,8)

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(1,-2,8)

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(1,2,8)

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(1,-2,-8)

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Solution

The correct option is B
(1,-2,8)

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Three vertices of a parallelogram ABCD are A(3,-1,2), B(1,2,4) and C(-1,1,2). Find the fourth vertex .

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