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JEEMAIN-2015
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Q)
The sum of coefficient on integral powers of x in the binomial expansion of
(
1
−
2
√
x
)
50
is :
1
2
(
2
50
+
1
)
1
2
(
3
50
+
1
)
1
2
(
3
50
)
1
2
(
3
50
−
1
)
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