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if f(x) = tan^(1) x -(1//2) en x. then...

if f(x) = `tan^(1) x -(1//2) en x.` then

A

the greatest value of f(x) on `[ 1//sqrt(3) , sqrt(3)]` is `pi//6 +(1//4) en 3`

B

the least value of f(x) on `[ 1//sqrt(3),sqrt(3) ] " is " pi//3 -(1//4) en 3`

C

f(x) decreases on `(0,oo)`

D

f(x) increases on `(-oo,0)`

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