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Question: Answered & Verified by Expert
If a+b+c=0 and a2+b2+c2-ab-bc-ca0, a,b,cR, then the system of equations ax+by+cz=0, bx+cy+az=0 and cx+ay+bz=0 has
MathematicsDeterminantsJEE Main
Options:
  • A A unique solution
  • B Infinite solutions
  • C No solution
  • D Exactly two solutions
Solution:
1617 Upvotes Verified Answer
The correct answer is: Infinite solutions
Note that abcbcacab=-a+b+c2a-b2+b-c2+c-a2
Since, D=0 & 0,0,0 is a solution, hence the system has infinite solutions.

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