Math  /  Algebra

Questionوجد معكوس المصفوفة A A=[203314125]A=\left[\begin{array}{lll} 2 & 0 & 3 \\ 3 & 1 & 4 \\ 1 & 2 & 5 \end{array}\right]

Studdy Solution
نقسم كل عنصر في المصفوفة المرافقة على المحدد:
A1=[1311959237919131929]A^{-1} = \left[\begin{array}{ccc} -\frac{1}{3} & -\frac{11}{9} & \frac{5}{9} \\ \frac{2}{3} & \frac{7}{9} & -\frac{1}{9} \\ -\frac{1}{3} & \frac{1}{9} & \frac{2}{9} \end{array}\right]
المعكوس للمصفوفة A A هو:
A1=[1311959237919131929]A^{-1} = \left[\begin{array}{ccc} -\frac{1}{3} & -\frac{11}{9} & \frac{5}{9} \\ \frac{2}{3} & \frac{7}{9} & -\frac{1}{9} \\ -\frac{1}{3} & \frac{1}{9} & \frac{2}{9} \end{array}\right]

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