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最佳答案:57.6/18=3.275*16=16X+8091+4X=1273x-0.9=2.42X-2=4x2-4=0x2-7=0x2-9=04y2=916x2-49=0
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最佳答案:X+3/X+2 + X+5/X+4 = X+6/X+5 + X+2/X+1.1/(x+2)+1/(x+4)=1/(x+5)+1/(x+1)1/(x+1)-1/(