If A=⎡⎢⎣x2−12−xx−αx−2x2−2x+1x+βα−x−x−βx2−3 – InterviewSolution

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1.	If A=⎡⎢⎣x2−12−xx−αx−2x2−2x+1x+βα−x−x−βx2−3x+2⎤⎥⎦,α≠β and α,β<0, then the value of \|A\| at x=1, is
Answer» If $A = ⎡ ⎢ ⎣ \begin{matrix} x^{2} - 1 & 2 - x & x - α x - 2 & x^{2} - 2 x + 1 & x + β α - x & - x - β & x^{2} - 3 x + 2 \end{matrix} ⎤ ⎥ ⎦, α \neq β$ and $α, β < 0,$ then the value of $\| A \|$ at $x = 1,$ is

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