A) \[12{{a}^{11}}\]
B) \[12{{b}^{11}}a\]
C) \[12{{a}^{11}}b\]
D) \[12{{a}^{11}}{{b}^{11}}\]
Correct Answer: C
Solution :
\[{{\left[ \exp \frac{a}{x} \right]}^{12-r}}+{{[\exp bx]}^{r}}=-10\] \[\Rightarrow -12+r+r=-10\Rightarrow r=1\] Then coefficient of \[{{x}^{-10}}\]is \[^{12}{{C}_{1}}{{(a)}^{11}}{{(b)}^{1}}=12{{a}^{11}}b\].You need to login to perform this action.
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