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Q.

1+xn=r=0nCrxr then match the following
 

List - IList - II
A) 1+2x+3x2+4x3+   p) (1-x)-3 
B) 1-x+x2-x3++(-1)rxr+q)(1-x)-2 
C) S1+S2x+S3x2++Sr+1xr+ Where Sr=1+2+3++rr) (1+x)-1           

 

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a

A-q, B-p, C-r

b

A-p, B-r, C-q

c

A-r, B-p, C-q

d

A-q, B-r, C-p

answer is D.

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Detailed Solution

 1+2x+3x2+4x3+      =1-x-2

II. 1-x+x2-x3++(-1)rxr+ =1+x-1     

S1+S2x+S3x2++Sr+1xr+= =1+3x+6x2+10x3+.......=1-x -3

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