?????飺???????2014?????????????????????????????
??????120??????120?????
?????????С??3?????30???
?С???????????????????????????????????????????????????????????????????????.
1??????????????????????????????????????????Σ??????????????濴?????????????????
A B C D
2??????x2 = 2x?????
A??x=2 B??x1= ??x2= 0 C??x1=2??x2=0 D??x = 0
3 ??????y= ??k??0??????????2??-2?????????????????????????????е?
A????????????? B?????????????? C????????????? D?????????????
4????????????У????? ?? ??????????
A B C D
5?????? ???????????????????÷????
A?? B??
C?? D?????????????
