youzhishizhi hǎonǐ deyou shihe hao-(15)/(16)= shi toushizduosshaozhúzizhú mǎzhú lin-π/(4)=-π duo xinbuduori chumenyáyueyáchu fachu Iáichū.Ikouchū touhaode zi lai shuishao jianbújjiandui libiyibiyou yiíge=-((2+x))/((x-1)) dui baidui bima mayou...