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Let f(x) =sqrt(9-x^(2))." then , domai...

Let ` f(x) =sqrt(9-x^(2))." then , domain " (f ) =?`

A

`[-3,3]`

B

`(-oo,-3]`

C

`[3,oo)`

D

`(-oo,-3] uu (4,oo)`

Text Solution

Verified by Experts

The correct Answer is:
A
`f(x) ` is defined only water `9-x^(2) ge 0 rArr x^(2) 9 rArr -3 le x le 3. `
` :. ` dom `(f) =[-3,3]`
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