已知函数y=
（1）画出函数的图象； （2）求函数的单调区间； （3）求函数在区间[-2，3]上的最大值与最小值． |
（1）x≥0时，y=-2（x-1）2+2，则函数的图象如图所示
．
（2）由图象可知，函数在区间（-∞，0]和（1，+∞）上单调递减；在区间（0，1]上单调递增；
（3）函数在区间[-2，0]和（1，3]上单调递减；在区间（0，1]上单调递增
∴x=-2时，函数最大值为4，x=3时，函数最小值为-6．
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| My mother was the one who always beat me. I always cried loudly to let the neighbors 1 she was killing me. For example, if she acted as though she was about to 2 her hand to me, I would open my 3 and let the world know about it. If anybody was passing by out on the road, 4 would either change her mind or just give me a few light touches. Thinking about it now, I feel certain that just as my father supported me for being 5 than the other children, my mother gave me more shout for the 6 reason. She was very bright herself, but she liked the ones who were 7 . Jimmy, my eldest brother, I knew, was especially her 8 . I remember that he would tell me to get out of the house. "Let the sun shine on you so.you can get some color." He went out of his way 9 to let me have a sense of color-advantage. I learned early that crying out in disagreement could finish things. My older brothers and sister would sometimes come in from school and 10 一a biscuit with butter or something. My mother impatiently, would tell them no. But I would cry out and make a big noise until I got what I wanted. I remember well how my mother asked me 11 I couldn't be a nice boy like Wilfred. But I would think to myself that Wilfred, for being so nice and quiet, often stayed 12 . So early in life, I had learned that if you want something, you had better make some noises. | ||||
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