一道sat数学 if 0≤x≤8 and -1≤y≤3,which of the following gives the
3个回答
找极值点,两个都正数或负数,就找出绝对值最大的这里是(x,y)=(8,3)
所以xy最大为24
最小同理,(x,y)=(8,-1),此时xy=-8
因此选e
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