The coefficient of \[{{x}^{-7}}\] in the expansion of \[{{\left[ ax-\frac{1}{b{{x}^{2}}} \right]}^{11}}\] will be:

\[\frac{-462{{a}^{5}}}{{{b}^{6}}}\]

\[\frac{462}{{{b}^{5}}}{{a}^{6}}\]

\[\frac{462{{a}^{5}}}{{{b}^{6}}}\]

\[\frac{-462{{a}^{6}}}{{{b}^{5}}}\]

The coefficient of \[{{x}^{-7}}\] in the expansion of \[{{\left[ ax-\f

1.	The coefficient of \[{{x}^{-7}}\] in the expansion of \[{{\left[ ax-\frac{1}{b{{x}^{2}}} \right]}^{11}}\] will be:
A.	\[\frac{462}{{{b}^{5}}}{{a}^{6}}\]
B.	\[\frac{462{{a}^{5}}}{{{b}^{6}}}\]
C.	\[\frac{-462{{a}^{5}}}{{{b}^{6}}}\]
D.	\[\frac{-462{{a}^{6}}}{{{b}^{5}}}\]
Answer» C. \[\frac{-462{{a}^{5}}}{{{b}^{6}}}\]

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The coefficient of \[{{x}^{-7}}\] in the expansion of \[{{\left[ ax-\frac{1}{b{{x}^{2}}} \right]}^{11}}\] will be:

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