Use multinomial theoram taking powers of a+b+d = 8 and consider cases b=1..8 might be a simpler method but can think of this only this right now
yes its correct but method
i tried but not getting answer
Yeah got it posting
see first find sum of cefficient which does not contain c by puting c=0 (a=b=c=1)
- other case which do not contain b and c
subtract both u will get result..