Question

find the domain and range of f(x)= root x sq -25. Answer within a few mins

Answer 1

Heya 

f(x) = √x²-25

we take expressions under root positive to find the domain 
so 
x²-25 ≥0

x² ≥ 25
x ≥ ⁺₋ 25 
so 
x∈ (-∞, -25] ∪ [25 , ∞)

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