∵x>1,∴x+4x-1=x-1+4x-1+1≥2(x-1)•4x-1+1=5.当且仅当x=3时取等号.
故选B.
_____ in the film The Water Margin as Song Jiang has helped actor Zhang Hang Yu gain more fans. [ ]
A. Starred
B. Starring
C. To star
D. Having starred
10111B是一个()。
A、十六进制数
B、二进制数
C、十进制数
D、以上都错误