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A=[(a^2, ab,ac),(ab,b^2,bc), (ac, bc, c^...

`A=[(a^2, ab,ac),(ab,b^2,bc), (ac, bc, c^2)]` and ` a^2+b^2+c^2=1`, then `A^2` (A) A (B) 2A (C) 3A (D) 4A

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