KEAM 2012 Math Paper

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Question : 47 of 120

Marks: +1, -0

If C0,C1,C2,C3,... are binomial coefficients in the expansion of (1+x)n, then

C0

3

−

C1

4

+

C2

5

−

C3

6

+... is equal to

1
n+1
−
2
n+2
+
1
n+3
1
n+1
+
2
n+2
−
1
n+3
1
n+2
−
1
n+1
+
1
n+3
2
n+1
−
1
n+2
+
2
n+3
1
n+2
−
2
n+1
+
1
n+3

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