Question

the no. of terms in expansion (a+b+c)^9

Answer 1

hai,


For expansion of (a+b+c)^n has
(n+1)(n+2)/2 terms

here n=9

so (9+1)(9+2)/2

therefore 10*11=110/2
=55 terms

hope helped :)

Answer 2

use formula,
( a + b + c)ⁿ
then no of terms = (n+1)(n+2)/2

then
n = 9

no of terms = (9+1)(9+2)/2 = 55