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Manipal Entrance Test 2017 Math Paper
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© examsnet.com
Question : 15 of 70
Marks:
+1
,
-0
The middle term of
(
√
x
−
1
√
x
)
6
is
-20
-1
1
None of these
Validate
Solution:
Middle term is
(
n
2
+
1
)
th term for
n
even.
∴ Middle term
=
(
6
2
+
1
)
=
4
th term
T
4
=
6
C
3
(
√
x
)
3
(
−
1
√
x
)
6
−
3
=
6
!
3
!
3
!
(
√
x
)
3
(
−
1
)
3
(
√
x
)
3
=
−
6
×
5
×
4
6
=
−
20
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