A,(√2-3)零次方+(1-√2)÷(1+√2)-0.125的2/3次方

问题描述:

A,(√2-3)零次方+(1-√2)÷(1+√2)-0.125的2/3次方
B,△ABC中CD是中线,且CD=1/2AB判定△ABC形状并说明理由
C,已知C在线段AB上,△DAC,△ECB在AB同侧,都是等边△,AE交CD与F,BD交CE与G,判定△CFG的形状,并证明

A,(√2-3)零次方+(1-√2)÷(1+√2)-0.125的2/3次方 =1-(1-√2)^2-0.25=1-1-2+2√2-0.25=2√2-2.25B,△ABC中CD是中线,且CD=1/2AB判定△ABC形状并说明理由CD=BD角B=角BCDCD=AD角A=角ACD角A+角B=角ACB是直角...