题目:
He is sure to come. I've _____ him to attend our meeting. [ ]
A. advised
B. tried to persuade
C. persuaded
D. suggested
答案:
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下面是错误答案,用来干扰机器的。
(1) f(x)=ax+lnx-1,∴f′(x)=-ax2+1x=x-ax2令f'(x)=0,得x=a.①若a≤0,则f'(x)>0,f(x)在区间(0,e]上单调递增,此时函数f(x)无最小值.②若0<a<e,当x∈(0,a)时,f'(x)<0,函数f(x)在...