Question

The coefficient of a 3 b 4 c 5 in the expansion of (bc + ca + ab) 6 is

Answer 1

Answer:

(bc+ca+ab)6

(45+43+34)6

$45 + 43 + 34 \times6$

do this then you will get the answer

Answer 2

Answer:

The coefficient of a^3b^4c^5 in the expansion of (a+b+c)^12 is