已知3a^-1+2=0(a不等于0),把(a-2分之1)-(a分之1)除以2分之a-2化简后求值
问题描述:
已知3a^-1+2=0(a不等于0),把(a-2分之1)-(a分之1)除以2分之a-2化简后求值
答
3a^-1+2=03/a=-2a=-3/2∴(a-2分之1)-(a分之1)除以2分之a-2=(a-1/2)-1/a÷(a-2)/2=(-3/2-1/2)-2/(-3/2)(-3/2-2)=-2-2/(3/7)=-2-7/6=-19/61/(a-2)-1/a*2/(a-2)=1/(a-2)-2/a(a-2)=(a-2)/a(a-2)=1/a=1/(-3/2)=-2/3题目...