江蘇省2009屆高三數(shù)學(xué)小題訓(xùn)練086
1.已知全集U=Z,A={-1,0,1,2},B={x|x2=x},則ACUB=______________.
2.命題p:x∈R,2x2+1>0的否定是______________.
3.已知{an}是等差數(shù)列,a6+a8=6,前12項(xiàng)的和S12=30,則其公差d=_______________.
4.若,則=_______________.
5.設(shè)Sn為等比數(shù)列{an}的前n項(xiàng)和,若a1=1,q=3,Sk=364,則ak=______________.
6.已知y=loga(3-ax)在[0,2]上是x的減函數(shù),則實(shí)數(shù)a的取值范圍為_____________.
7.定義=x(x+1)(x+2)…(x+n-1),其中x∈R,n∈N*,例如=(-4)(-3)(-2)(-1)=24,則函數(shù)f(x)= 的奇偶性為______________.
8.設(shè)f(x)是定義在實(shí)數(shù)集R上的函數(shù),滿足條件y=f(x+1)是偶函數(shù),且當(dāng)x≥1時(shí),f(x)=2x-1,則f()、f()、f()按從小到大的順序排列為_________________.
9.對任意實(shí)數(shù)x、y,函數(shù)f(x)滿足f(x)+f(y)=f(x+y)-xy-1,若f(1)=1,則對于正整數(shù)n,f(n)的表達(dá)式為f(n)=_______________.
10.給出四個(gè)函數(shù):①;②;③;④,則下列甲、乙、丙、丁四個(gè)函數(shù)圖象對應(yīng)上述四個(gè)函數(shù)分別是_____________(只需填序號).
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