问题
填空题
设f(x)=
|
答案
因为f(x)=
,ex(x≤0) ln x(x>0)
所以f(
)=ln1 3
<0,1 3
所以f[f(
)]=f(ln1 3
)=eln1 3
=1 3
,1 3
故答案为
.1 3
设f(x)=
|
因为f(x)=
,ex(x≤0) ln x(x>0)
所以f(
)=ln1 3
<0,1 3
所以f[f(
)]=f(ln1 3
)=eln1 3
=1 3
,1 3
故答案为
.1 3
用方框中所给单词的适当形式填空.每词限用一次. | |
2. It's the _____________ season in China because of Spring Festival. 3. Ask him if he wants to write something about staying ______________. 4. In fact, even the simplest everyday activities can make a real ___________to the environment. 5. You are not _______________to touch the exhibits. |