分式的加减,
化简X的平方减四分之四+X+2分之1=化简1/X+1-/1X-1=化简,X+1-X方/X-1第三题要解题过程...
化简 X的平方减四 分之 四+X+2 分之 1 =
化简1/X+1-/1X-1=
化简, X+1-X方/X-1 第三题要解题过程 展开
化简1/X+1-/1X-1=
化简, X+1-X方/X-1 第三题要解题过程 展开
2个回答
2012-03-12 · 知道合伙人教育行家
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4/( X²-4)+1/(毁和X+2)
=4/(X+2)(X-2)+1/(X+2)
=4/(X+2)(X-2)+(X-2)/(X+2)(X-2)
=[4+(X-2)]/(X+2)(X-2)
=(X+2)/(X+2)(X-2)
=1/(X+2)
1/(X+1)-1/(X-1)
=(X-1)/(X+1)(X-1)-(X+1)/(X+1)(X-1)
=[(X-1))-(X+1)]/(X+1)(X-1)
=-2/(X²-1)
X+1-X²/(X-1 )
=(X+1)(键御X-1 )/(X-1 )-X²/(X-1 )
=(X²-1)/(X-1 )-X²/(X-1 )
=[(X²-1)纤亮盯-X²]/(X-1 )
=-1/(X-1 )
=4/(X+2)(X-2)+1/(X+2)
=4/(X+2)(X-2)+(X-2)/(X+2)(X-2)
=[4+(X-2)]/(X+2)(X-2)
=(X+2)/(X+2)(X-2)
=1/(X+2)
1/(X+1)-1/(X-1)
=(X-1)/(X+1)(X-1)-(X+1)/(X+1)(X-1)
=[(X-1))-(X+1)]/(X+1)(X-1)
=-2/(X²-1)
X+1-X²/(X-1 )
=(X+1)(键御X-1 )/(X-1 )-X²/(X-1 )
=(X²-1)/(X-1 )-X²/(X-1 )
=[(X²-1)纤亮盯-X²]/(X-1 )
=-1/(X-1 )
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