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Problems
Let
f
(
x
)
=
{
e
1
/
x
,
x
<
0
,
k
,
x
=
0
,
ln
(
1
+
x
)
,
x
>
0.
f(x)=\begin{cases} e^{1/x}, & x<0,\\ k, & x=0,\\ \ln(1+x), & x>0. \end{cases}
f
(
x
)
=
⎩
⎨
⎧
e
1/
x
,
k
,
ln
(
1
+
x
)
,
x
<
0
,
x
=
0
,
x
>
0.
…
Mathematics
Problem
Let
f
(
x
)
=
{
e
1
/
x
,
x
<
0
,
k
,
x
=
0
,
ln
(
1
+
x
)
,
x
>
0.
f(x)=\begin{cases} e^{1/x}, & x<0,\\ k, & x=0,\\ \ln(1+x), & x>0. \end{cases}
f
(
x
)
=
⎩
⎨
⎧
e
1/
x
,
k
,
ln
(
1
+
x
)
,
x
<
0
,
x
=
0
,
x
>
0.
Determine the value of
k
k
k
that makes
f
f
f
continuous at
x
=
0
x=0
x
=
0
.
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