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If coefficient of a2b3c4 in (a+b+c)m (where mN is L (L0), then in same expansion coefficient of a4b4c1will be

a
L
b
L3
c
mL4
d
L2

detailed solution

Correct option is D

As L≠0∴ m=2+3+4=9∴ L=9!2!3!4!Now coefficient of a4b4c=9!4!4!1!=L2

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