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Problem
Problem
If
l
=
lim
x
→
∞
(
x
+
1
x
−
1
)
x
l = \lim_{x \to \infty} \left( \frac{x+1}{x-1} \right)^x
l
=
lim
x
→
∞
(
x
−
1
x
+
1
)
x
, the value of
l
{l}
l
and
[
l
]
[l]
[
l
]
are a. 7 b.
7
−
e
2
7 - e^2
7
−
e
2
c.
−
7
-7
−
7
d.
e
2
−
7
e^2 - 7
e
2
−
7
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