α − 3 es no invertible?. ¿Para que valores de α la matriz 4 1−α α −3 = α (1 − α ) + 12 = −α 2 + α + 12 = 0 4 1−α Aplicando Baskara se obtienen las raíces α 1 = −3 y α 2 = 4 . Por lo tanto la matriz es no invertible para α 1 = −3 ó α 2 = 4 .
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