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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,oo)`b)`[81,oo)`c)`(-oo,81)` d)`(-oo,81]`

A

`(81,oo)`

B

`[81,oo)`

C

`(-oo,81)`

D

`(-oo,81]`

Text Solution

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The correct Answer is:
A
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