Answer:
C
Step-by-step explanation:
The general form of a polynomial expression is
[tex]a_{n}[/tex][tex]x^{n}[/tex] + [tex]a_{n-1}[/tex][tex]x^{n-1}[/tex] + [tex]a_{n-2}[/tex][tex]x^{n-2}[/tex] + ............ + a₁[tex]x^{1}[/tex] + a₀
For the given polynomial the [tex]x^{n}[/tex] term is - [tex]x^{13}[/tex] , that is n = 13 , thus
n - 7 = 6 , that is the [tex]x^{6}[/tex] term
with [tex]a_{n-7}[/tex] being its coefficient
Since there is no [tex]x^{6}[/tex] term, then its coefficient is zero, that is
[tex]a_{n-7}[/tex] = 0 → C
