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森林消防员有年终奖吗
...m^2的速度顺风蔓延,消防站接到报警后立即派
消防员
前去,
答:
1250·x/(x-2)+100x+60000/(x-2)+30000 =1250(x-2+2)/(x-2)+100(x-2+2)+60000/(x-2)+30000 =[1250(x-2)+2500]/(x-2)+100(x-2)+200+60000/(x-2)+30000 =1250+2500/(x-2)++100(x-2)+60000/(x-2)+30200 = 31450+100(x-2)+62500/x-2 ...
棣栭〉
<涓婁竴椤
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