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if a and b are coefficients of xn in the expansion
Question:
If A and B are coefficients of x
n
in the expansions of (1+ x)2
n
and (1+x)
2n – 1
respectively, then A/B is equal to
WBJEE
Updated On:
Feb 2, 2024
(A) 4
(B) 2
(C) 9
(D) 6
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Verified By Collegedunia
The Correct Option is
B
Solution and Explanation
Explanation:
A
=
2
n
C
n
B
=
2
n
−
1
C
n
A
B
=
2
n
C
n
2
n
−
1
C
n
=
2
n
n
=
2
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