问题
选择题
设f(x)=
|
答案
因为f(x)=
,则f(-2x(x≥0) f(x+1)(x<0)
)=f(-3 2
+1)=f(-3 2
)=f(1-1 2
)=f(1 2
)=21 2
=1 2
.2
故选C.
设f(x)=
|
因为f(x)=
,则f(-2x(x≥0) f(x+1)(x<0)
)=f(-3 2
+1)=f(-3 2
)=f(1-1 2
)=f(1 2
)=21 2
=1 2
.2
故选C.