Expansion Coefficients and Quadratic Sums (JEE … | ExamDuo
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Properties of binomial coefficients
Medium
Expansion Coefficients and Quadratic Sums
If in the expansion of (1 + x )
p
(1 – x)
q
, the coefficients of x and x
2
are 1 and –2, respectively, then p
2
+ q
2
is equal to :
SELECT ONE OPTION
A
8
B
18
C
13
D
20
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