Fireburntbudder
Fireburntbudder
04.11.2020 • 
Mathematics

What is the domain of f(x)= \frac{1}{ \sqrt{ {x}^{2} \:  - 6x - 7} }
A. (1,7)
B. { x < -1} U {x > 7}
C. [-1,7]
D. (- infinity, -1] U [ 7, infinity)
E. x > -1 or x < 7

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