化简:x+(1/x-1)+(x²-3x+4/1-x²)
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化简:x+(1/x-1)+(x²-3x+4/1-x²)
化简:x+(1/x-1)+(x²-3x+4/1-x²)
化简:x+(1/x-1)+(x²-3x+4/1-x²)
x+(1/x-1)+(x²-3x+4/1-x²)
=x+(1/x-1)+(x²-3x+4-x²)
=x+1/x-1+x²-3x+4-x²
=x+1/x-1-3x+4
=x-3x-1+4+1/x
=-2x+3+1/x
-2x+1/x—1+4