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  3. 3 a let p q r be points in r3...

Question: 3 a let p q r be points in r3...

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3. a. Let P, Q, R be points in R3. Find the area of the triangle with the vertices at P(1,-1,2), Q(2,1,3), R(-1, 2, 1). [4 points] b. Find the distance of the origin from the plane through P, Q,R. [2 points]
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