约分(x^n+2)+(x^n+1)-6x^n/(2x^n+1)+5x^n-(3x^n-1)
问题描述:
约分(x^n+2)+(x^n+1)-6x^n/(2x^n+1)+5x^n-(3x^n-1)
答
[(x^n+2)+(x^n+1)-6x^n]/[(2x^n+1)+5x^n-(3x^n-1) ]
=(-4x^n+3)/(4x^n+2)
=-1+5/(4x^n+2)