4. Let a-i+j+,i andi+c,k Then(a) If c! = 1 and с, = 2, find c, which – InterviewSolution

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1.	4. Let a-i+j+,i andi+c,k Then(a) If c! = 1 and с, = 2, find c, which makes a, b and c coplanar . (Ans. c,-2)(b) If с,--1 and c31, show that no value of cı can make ā, b and c coplanar.
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