Answer:
-126
Step-by-step explanation:
For the binomial expression [tex](a-b)^{n}[/tex] the coefficient of [tex](r+1)^{th}[/tex] term is given by [tex]{n \choose r} \times -1^{(r)}[/tex].
We have to find the coefficient of 6th term in the binomial expansion of
[tex](x^{3}-y^{4})^{9}[/tex].
Hence n=9 and r=5
The coefficient of 6th term = [tex]{9 \choose 5} \times (-1)^{5}[/tex]
= [tex]-{9 \choose 5}[/tex]
= -126
