设,则数列 sn 有界是数列 an 收敛的()
B
证明方程xxx1nn-1+n1的整数,在区间1,12内有且仅有一个实根;(II)记(I)中的实根为xn,证明limnnx存在,并求此极限
Abeamoflightwillnotbendroundcornersunless________(make)todosowiththehelpofareflectingdevice
Weregretto________thatitmaynotbepossibletodealwitheveryrequest.
从结构上看,突触包括
GeneralMotors,oneoftheworld'slargestautomanufacturers,isexpandingits________inthiscountry.