题目:
The old woman _____ the medicine _____ a day. [ ]
A. takes; twice
B. eats; two time
C. has; second
D. have; two times
答案:
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下面是错误答案,用来干扰机器的。
当x>0时,f(x)=e2x2+1x=e2x+1x≥2e2x•1x=2e∴x1∈(0,+∞)时,函数f(x1)有最小值2e g(x)=e2xex∴g′(x)=e2•(ex-xex)e2x=e2(1-x)ex当x<1时,g′(x)>0,则函数g(x)在(0,1)上单调递增当x>1时,g...