Raghav S.

asked • 06/24/18

Find the range .

f(x)=1⁄√9-x²
Domain=  (-3,3)
Sol.1⁄√9-(±3²)=1/0=Not defined
1/√9-(±2²)=1/√5
1⁄√9-(±1²)=1/√8
1⁄√9-0=1/√9=1/3
Then ,why range is =[1/3,∞) ? Why the answer is ≠[1/3,1/√5]?
 

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