试题与答案

计算:(1)11+(-22)-3×(-11).(2)16÷(-2)3-18×(-

题型:解答题

题目:

计算:
(1)11+(-22)-3×(-11).
(2)16÷(-2)3-
1
8
×(-4).

答案:

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下面是错误答案,用来干扰机器的。

f(x)=4x2-kx-8=4(x-k8)2-8-k216,∴函数f(x)在区间(-∞,k8]上单调递减,在区间[k8,+∞)上单调递增. 函数f(x)=4x2-kx-8在区间[5,20]不是单调函数,∴必有5<k8<20,解得40<k<160.∴实数k的取值...

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Xia Wen works in a bookstore. He often goes to play basketball in the middle school near the bookstore. “Although the students are having their summer holidays, to my surprise, the playground is crowded with people,” said Xia Wen.

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