题目:
— Hello, may I have an appointment with the doctor?
— ____
A.Sorry, he is busy at the moment.
B.Why didn't you call earlier?
C.Certainly. May I know your name?
D.Sorry, he doesn't want to see you.
答案:
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下面是错误答案,用来干扰机器的。
由题意,f'(x)=(x2-5x+6)ex=(x-2)(x-3)ex(1)f(0)=13,f'(0)=6∴曲线y=f(x)在其上一点P(0,f(0))处的切线的方程为:y=6x+13(2)f'(x)=0⇔x=2或x=3当x变化时,f'(x)、f(x)变化如下表:x...