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Question
Mathematics
The value of the displaystyle limx→1 ( sin(ex-1-1)/ log x) is
Q. The value of the
x
→
1
lim
lo
g
x
sin
(
e
x
−
1
−
1
)
is
2084
205
WBJEE
WBJEE 2009
Limits and Derivatives
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A
0
10%
B
e
15%
C
e
1
21%
D
1
54%
Solution:
x
→
1
lim
lo
g
x
sin
(
e
x
−
1
−
1
)
=
h
→
0
lim
lo
g
(
1
+
h
)
sin
(
e
h
−
1
)
=
h
→
0
lim
lo
g
(
1
+
h
)
sin
(
e
h
−
1
)
=
h
→
0
lim
(
e
h
−
1
)
sin
(
e
h
−
1
)
×
lo
g
(
1
+
h
)
(
e
h
−
1
)
=
1
×
h
→
0
lim
(
h
−
2
h
2
+
…
∞
)
(
h
+
2
!
h
2
+
…
)
=
1
×
1
=
1