如圖1,點(diǎn)A(1,a)、點(diǎn)B(0,1)在直線y=2x+b上,反比例函數(shù)y=
(x>0)的圖象經(jīng)過(guò)點(diǎn)A.
(1)求a和k的值;
(2)將線段AB向右平移m個(gè)單位長(zhǎng)度(m>0),得到對(duì)應(yīng)線段CD,連接AC、BD.
①如圖2,當(dāng)點(diǎn)D恰好落在反比例函數(shù)圖象上時(shí),過(guò)點(diǎn)C作CF⊥x軸于點(diǎn)F,交反比例函數(shù)圖象于點(diǎn)E,求線段CE的長(zhǎng)度;
②在線段AB運(yùn)動(dòng)過(guò)程中,連接AD,若△ACD是直角三角形,求所有滿足條件的m值.