22. The integer $n$ for which $\lim _ { x \rightarrow 0 } ( \cos x - 1 ) \left( \cos x - e ^ { x } \right) / x ^ { n }$ is a finite non-zero number is (A) 1
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22. The integer $n$ for which $\lim _ { x \rightarrow 0 } ( \cos x - 1 ) \left( \cos x - e ^ { x } \right) / x ^ { n }$ is a finite non-zero number is\\
(A) 1
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(B) 2\\
(C) 3\\
(D) 4\\