若x•log3 2011=1,则2011x+2011-x=( )
举一反三
- 对任意x∈R,函数f(x)的导数存在,若f′(x)>f(x),则以下正确的是( ) A: f(2011)>e2011?f(0) B: f(2011)<e2011?f(0) C: f(2011)>f(0) D: f(2011)<f(0)
- 设函数f1(x)=x12,f2(x)=x-1,f3(x)=x2,则f3{f2[f1(2011)]}=( )
- 求不定积分[img=115x46]17da65382f8e1b9.png[/img]; ( ) A: x - (5*log(x + 1))/4 - (3*log(x - 3)) B: (5*log(x + 1))/4 - (3*log(x - 3)) C: x - (5*log(x + 1))/4 - (3*log(x - 3))/4 D: (5*log(x + 1))/4 - (3*log(x - 3))/4
- (2011)如果f(x)在x0可导,g(x)在x0不可导,则f(x)g(x)在x0:()
- 设函数f(x)的定义域为R,且f(x+2)=f(x+1)-f(x),若f(4)<-1,f(2011)=a+3a-3,则a的取值范围是( )