以下是引用redtea在2002-12-13 16:04:48的发言:
??20、|X+3|≤2,求2-X的最大值?
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[确认]5
请问为什么不是7?
以下是引用leqi在2002-12-16 13:16:59的发言:
16. is 50 month or 50 weeks?
if 50 month then
50 month=4years+2month
4years=365*4+1(闰年多一天)=1461 days=208 weeks + 5 Days
2 month= 30+31=8 weeks+5days
28+31=8 weeks +3 days
31+31=8weeks+6 days
50 month= 208+8+1=217 weeks
total=800+217*(1+217)/2=24453
IS IT RIGHT?
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