MathematicsMedium244×since 2002Q4494If A = {1 \over 2}\left[ {\matrix{ 1 & {\sqrt 3 } \cr { - \sqrt 3 } & 1 \cr } } \right], then :AA30−A25=2I\mathrm{A^{30}-A^{25}=2I}A30−A25=2IBA30+A25−A=I\mathrm{A^{30}+A^{25}-A=I}A30+A25−A=ICA30=A25\mathrm{A^{30}=A^{25}}A30=A25DA30+A25+A=I\mathrm{A^{30}+A^{25}+A=I}A30+A25+A=ICheck answerSkip