【判断题】设有数列【图片】,它的奇子列【图片】与偶子列【图片】均收敛,则数列【图片】必收敛.
【简答题】设幂级数f(x)=a 0 +a 1 x+…+a n x n +…于x=1处为收敛.又设0<α<1.则下列幂级数 必于h=1-α处为收敛,其和为f(1).[哈兑-列脱胡特]
【简答题】( Dirichlet ) 设 i > 级数 的 , ii > 数列 . 则级数 收敛 .
【单选题】In spring, days are getting ________
D.
the longer, the longer
【单选题】设有数列 ,下列断语中 ( ) (1) 若 ,且 ,则数列 收敛; (2) 若 ,且 ,又数列 收敛, 则数列 都收敛。
【简答题】圆形等截面梁的直径 d=30mm ,危险截面的正应力 σ max =100Mpa ,则危险截面的弯矩 M max = N.m. 。
【单选题】Questions 22 to 25 are based on the passage you heard.
A.
They need decorations to show their status.
B.
They prefer unique objects of high quality.
C.
They decorate their homes themselves.
D.
They care more about environment.