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For the natural number m, n, if ( 1- y )...

For the natural number m, n, if `( 1- y ) ^(m) (1 + y) ^( n) =1 + a _(1) y + a _(2) y ^(2) + ...+ a _( m + n) y ^( m +n) and a _(1) = a _(2) = 10,` then the value of (m+n) is equal to :

A

100

B

80

C

83

D

64

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JEE MAINS PREVIOUS YEAR-JEE MAINS 2021-MATHEMATICS
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