Choose the correct options for the following questions.
In the expansion of $[x^{-\frac{1}{6}}-y^{\frac{1}{3}}]^{9}$ the term independent of x is
Difficulty: Easy
A:
-35
B:
-28
C:
41
D:
72
The term independent of x in the expansion of $(x^{3}-\frac{3}{x^{2}})^{15}$ is
Difficulty: Easy
A:
8th
B:
10th
C:
7th
D:
3rd
The middle term of the expansion $[\frac{1}{x}-\frac{x^{2}}{2}]^{12}$ is
Difficulty: Easy
A:
$\frac{231}{16}x^{6}$
B:
$-\frac{231}{10}x^{5}$
C:
$-1230x^{3}$
D:
$-3100x^{6}$
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