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If the matrix A=[(0,2b,c) (a,b,-c) (a,-b...

If the matrix `A=[(0,2b,c) (a,b,-c) (a,-b,c)]`,`A A^T=I` then which of the following is TRUE? (where I is the unit matrix of order `3x3)` `b=+-1/(sqrt(6))` (b) `c=+-1/(sqrt(3))` `a=+-1/(sqrt(2))` (d) `a=+-2`

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