A) {2, 3}
B) {5, 6, 7, 8, 9}
C) \[\phi \]
D) None of these
Correct Answer: B
Solution :
\[\because \,\,x!-(x-1)!\ne 0\Rightarrow x\in {{I}^{+}}-\{1\}\] |
\[{{2}^{\pi /{{\tan }^{-1}}x}}-4>0\,\,as\,\,{{\tan }^{-1}}x<\pi /2\] |
\[\therefore \,\,\,\,\frac{(x-4)(x-10)}{(x-1)!(x-1)}<0\] |
\[\therefore \,\,\,\,x\in \{5,\,\,6,\,\,7,\,\,8,\,\,9\}\] |
You need to login to perform this action.
You will be redirected in
3 sec