1.

The value of ?n? for which \[^{n-1}{{C}_{4}}{{-}^{n-1}}{{C}_{3}}-\frac{5}{4}{{.}^{n-1}}{{P}_{2}}

A. \[\{5,6,7,8,9,10\}\]
B. \[\{1,2,3,4,5,6,7,8,9,10\}\]
C. \[\{1,4,5,6,7,8,9,10\}\]
D. \[(-\infty ,2)\cup (3,11)\]
Answer» B. \[\{1,2,3,4,5,6,7,8,9,10\}\]


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