設(shè)xn=ann!/nn(其中a是正的常數(shù),n是正整數(shù)),則數(shù)列極限[(xn+1)/xn]的值是:()
A.a/e B.a C.e D.0
設(shè)f(x)=(1+e)/(2+e),則x=0是f(x)的:()
A.可去間斷點(diǎn) B.跳躍間斷點(diǎn) C.無(wú)窮間斷點(diǎn) D.振蕩間斷點(diǎn)
矩陣的特征值是:()
A. B. C. D.