find the domain and range of the function f(x)=√x²-9
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Given : f(x)= √x²-9
To Find : domain and range of the function
Solution:
f(x)= √x²-9
=> x²-9≥ 0
=> x² ≥ 9
=> x ≥ | 3 |
=> x ≤ -3 3 ≤ x
Domain = [ - ∞ , -3 ] ∩ [3 , ∞ ]
Range = [0 ,∞ ]
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