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2011????????????????????????п??????
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1.??????????????????????????????????????????????????.

2.?С????????????????????????????????????????????????????.

3.???????????????????????????.

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1. ????????

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A.     B.-2    C.     D.2

2.??????κ???y=ax2+bx+c??a??0???????

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A.-1??x??3        B.x??3

C.x??-1           D.x??3??x??-1                                                         

3.???????100??????????????x%??????120??????????з??????????

A.100??1-x%??2=120     B.100??1+x%??2=120

(4???) 

C.100(1+2x%)=120    D.100(1+x2%)=120

4.???????????????????????????

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