MathematicsEasy244×since 2002Q4514Let A = \left| {\matrix{ 5 & {5\alpha } & \alpha \cr 0 & \alpha & {5\alpha } \cr 0 & 0 & 5 \cr } } \right|. If ∣A2∣=25,\,\,\left| {{A^2}} \right| = 25,A2=25, then ∣α∣\,\left| \alpha \right|∣α∣ equalsA1/51/51/5B555C52{5^2}52D111Check answerSkip