A) 36 sq units
B) 0 sq unit
C) 39 sq units
D) 11 sq units
Correct Answer: B
Solution :
Let \[OA=i-2j+3k,OB=-2i+3j-k\] and \[OC=4i-7j+7k\] \[\therefore \] \[AB=-2i+3j-k-i+2j-3k\] \[=-3i+5j-4k\] and \[AC=4i-7j+7k-i+2j-3k\] \[=3i-5j+4k\] \[\therefore \] \[AB=-AC\] \[\Rightarrow \] Three points A, B and C are collinear. \[\Rightarrow \] Area of \[\Delta ABC=0\]
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