Q.

K=110(1)K1K10Ck=

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a

1+12+13+14+.+110

b

1+12+13+14+.+111

c

1+12+13+14+.+112

d

1+12+13+14++19

answer is B.

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Detailed Solution

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K=110(1)K1K10Ck10C1 10C22+ 10C33 10C1010= (1x)10=C0C1x+C2x2+()nCn 1(1x)10x=C1C2x+C3x2+(1)n1Cnxn1;011(1x)10xdx=C1xC2x22+C3x33..+(1)n1Cnxnn011x=t011t101tdt=C1C22+C33..+(1)n1cnn011+t+t2+t3+..+t9dt=C1C22+C33..+(1)n1cnn1+12+13+110=C1C22+C33+(1)nCnn

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