1.

The domain of the function `f(x)=(1)/(sqrt(""^(10)C_(x-1)-3xx""^(10)C_(x)))` isA. `{9,10,11}`B. `{9,10,12}`C. all natural numbersD. `{9,10}`

Answer» Correct Answer - D
Given function is defined if ` "'^(10)C_(x-1) gt 3""^(10)C_(x)`
or `(1)/(11-x) gt (3)/(x) " or " 4x gt 33`
or `x ge 9`
But `x le 10`
` :. x=9,10`


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