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The complete set of values of a for whic...

The complete set of values of a for which the function `f(x)=tan^(-1)(x^(2)-18x +a)gt 0 AA x in R` is
a. `(81, infty)`
b. `[81,infty)`
c. `(-infty,81)`
d. `(-infty,81]`

A

`(81, infty)`

B

`[81,infty)`

C

`(-infty,81)`

D

(-infty,81]`

Text Solution

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The correct Answer is:
A
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