题目内容
???( )
A.1+2i B. 1-2i C.2+i D.2- i
C
【解析】略
??f(x)=tan,?? ( )
A.f(0)>f(-1)>f(1) B.f(0)>f(1)>f(-1)
C.f(1)>f(0)>f(-1) D.f(-1)>f(0)>f(1)
???f(x)=x2-2x+1??=( )
A.0 B.4 C .7 D.2
???A(1,2),P(x,y)????, ??_________
??A(0, 1), B(1, 2), C(3, 4) ??-2=___________.
,??=( )
A. 0.1 B. 0.2 C. 0.3 D. 0.4
( )
( )
,??
( )
=( )
, ??
_________
-2
=___________.
,??
=( )