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a. Find the area of the triangle determined by the points P, Q, and R. b. Find a unit vector perpendicular to plane PQR.
a. Find the area of the triangle determined by the points P, Q, and R. b. Find a unit vector perpendicular to plane PQR. P(-1,1,0), Q(0,0,1), R(0,0,- 1) a. The area of the triangle is (Type an exact answer, using radicals as needed.)
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