Jimenez Schofield
05/27/2023 · Elementary School
Determinar si la matriz dada es invertible, de ser así, calcular su inversa utilizando el método de la matriz adjunta \[ C=\left[\begin{array}{ccc}-\frac{5}{6} & \frac{1}{3} & \frac{11}{6} \\ 0 & \frac{2}{3} & 2 \\ 1 & -\frac{1}{2} & -\frac{5}{2}\end{array}\right] \]
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Para determinar si la matriz dada es invertible, primero necesitamos calcular su determinante. Si el determinante es diferente de cero, la matriz es invertible.
La matriz dada es:
\[ C=\left[\begin{array}{ccc}-\frac{5}{6} & \frac{1}{3} & \frac{11}{6} \\ 0 & \frac{2}{3} & 2 \\ 1 & -\frac{1}{2} & -\frac{5}{2}\end{array}\right] \]
Calculamos el determinante de la matriz \( C \) utilizando la función de cálculo de determinantes. Si el determinante es diferente de cero, la matriz es invertible.
Matrices by following steps:
- step0: Evaluate the determinant:
\(\left[\begin{array}{rrr}{-\frac{5}{6}}&{\frac{1}{3}}&{\frac{11}{6}}\\{0}&{\frac{2}{3}}&{2}\\{1}&{-\frac{1}{2}}&{-\frac{5}{2}}\end{array}\right]\)
- step1: Use the appropriate notation:
\(\left|\begin{array}{cc}{-\frac{5}{6}}&{\frac{1}{3}}&{\frac{11}{6}}\\{0}&{\frac{2}{3}}&{2}\\{1}&{-\frac{1}{2}}&{-\frac{5}{2}}\end{array}\right|\)
- step2: Use cofactor expansion along a row:
\(-0\times \left|\begin{array}{cc}{\frac{1}{3}}&{\frac{11}{6}}\\{-\frac{1}{2}}&{-\frac{5}{2}}\end{array}\right|+\frac{2}{3}\times \left|\begin{array}{cc}{-\frac{5}{6}}&{\frac{11}{6}}\\{1}&{-\frac{5}{2}}\end{array}\right|-2\times \left|\begin{array}{cc}{-\frac{5}{6}}&{\frac{1}{3}}\\{1}&{-\frac{1}{2}}\end{array}\right|\)
- step3: Multiply:
\(-0+\frac{2}{3}\times \frac{1}{4}-2\times \frac{1}{12}\)
- step4: Evaluate:
\(-0+\frac{1}{6}-\frac{1}{6}\)
- step5: Rewrite the expression:
\(0+\frac{1}{6}-\frac{1}{6}\)
- step6: Remove 0:
\(\frac{1}{6}-\frac{1}{6}\)
- step7: Subtract the numbers:
\(0\)
El determinante de la matriz \( C \) es 0. Como el determinante es igual a 0, la matriz \( C \) no es invertible. Por lo tanto, no podemos calcular su inversa utilizando el método de la matriz adjunta.
Quick Answer
La matriz no es invertible, por lo que no se puede calcular su inversa.
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