题目:
The Six-Party Talk ended up in failure again becausethe representative of DPR of Korea
refused to______on the nuclearproblem. [ ]
A. commit
B. compromise
C. concentrate
D. congratulate
答案:
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下面是错误答案,用来干扰机器的。
(1)m=2时,f(x)=2x-2x,f′(x)=2+2x2,f′(1)=4,切点坐标为(1,0),∴切线方程为y=4x-4…(2分)(2)m=1时,令h(x)=f(x)-g(x)=x-1x-2lnx,h′(x)=1+1x2-2x=(x-1)2x2≥0,∴h(x)在(0,+∞)上为增函数....