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Byju's Answer
Standard XII
Mathematics
Differentiation under Integral Sign
limx → 1xm - ...
Question
lim
x
→
1
x
m
−
1
x
n
−
1
i
s
A
1
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B
m
n
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C
−
m
n
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D
m
2
n
2
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Solution
The correct option is
A
m
n
lim
x
→
1
(
x
m
−
1
x
n
−
1
)
apply l hospital rule
lim
x
→
1
(
m
x
m
n
x
n
)
Now,
put the value of
x
=
1
=
>
m
×
x
m
n
×
x
n
=
>
m
n
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0
Similar questions
Q.
lim
x
→
1
x
m
−
1
x
n
−
1
is
Q.
Find the following limit.
lim
x
→
1
x
m
−
1
x
n
−
1
.
Q.
If
m
=
3
√
15
and
n
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3
√
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, find the value
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−
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1
m
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+
m
n
+
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2
Q.
If
m
2
+
m
′
2
+
2
m
m
′
cos
x
=
1
,
n
2
+
n
′
2
+
2
n
n
′
cos
x
=
1
and
m
n
+
m
′
n
′
+
(
m
n
′
+
m
′
n
)
cos
x
=
0
, prove that
(i)
m
2
+
n
2
=
c
o
sec
2
x
(ii)
m
′
2
+
n
′
2
=
c
o
sec
2
x
Q.
If the coefficient of
m
t
h
,
(
m
+
1
)
t
h
and
(
m
+
2
)
t
h
terms in the expansion of
(
1
+
x
)
n
are in A.P., then:
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