=6; WHILE T<=20 DO BEGIN WRITE(F,T

4). Cho : t:=6; while t<=20 do begin write(f,t:6) ; if t mod 2=0 then t:=t*2+1 else t:=t-1 end; noọi dung teọp f laứ:a). 6 13 12 25 b). 6 13 12c). 6 8 10 12 d). 6 10 12 20