先化简:(x²+2x+1)/(x-2) ÷(x²-1)/(x-1)+1/(2-x) ,在选择一个合适的数代入求值急用,
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/25 15:28:13
x͑N@_e$pDF/R4Vk6Wz(V*'^aݙwF.qEǵ?T#'DnURY۔X145"qZZ"wzj稞Ƿz
y{_obI.Qm߉JRQ/`:I!y(k7N!$
.Z`V#uL1? lN5@/BJ_^WLA*,wdz nS#vi|z(Wb]:xΦ#a@,jEWK4~%u6 m]skHCWF(/0݂2}1ׄF|[t69NH(
先化简:(x²+2x+1)/(x-2) ÷(x²-1)/(x-1)+1/(2-x) ,在选择一个合适的数代入求值急用,
先化简:(x²+2x+1)/(x-2) ÷(x²-1)/(x-1)+1/(2-x) ,在选择一个合适的数代入求值
急用,
先化简:(x²+2x+1)/(x-2) ÷(x²-1)/(x-1)+1/(2-x) ,在选择一个合适的数代入求值急用,
原式=(x+1)²/(x-2)÷(x²-1)/(x-1)+1/(2-x) ,
=(x+1)²/(x-2)× 1/(x+1)+1/(2-x) ,
=x+1/x-2 + 1/(2-x) ,
=x+1/x-2 - 1/x-2
=x/x-2
取一个不等于2,不等于1的数代入即可,(尽量取一些好计算的数)
这是我自己做的,希望采纳.
原式=(x+1)²/(x-2)×(x-1)/(x+1)(x-1)-1/(x-2)
=(x+1)/(x-2)-1/(x-2)
=x/(x-2)
(x+1)²/(x-2)*(x-1)/(x+1)(x-1)+1/(2-x)
=(x+1)/(x-2)+1/(2-x)
=(x+1)/(x-2)+1/(x-2)
=(x-1)/(x-2)
祝你学习进步