You can put this solution on YOUR website! Find the domain of the function.
f(x) = 8 - sqrt(x^2 + 1)
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Two things to look for: denominators and radicans. Since no denominators, we only need to look at the radican.
The radican (expression inside the radical) must always≥0.
However, in this case, the radican can never be zero because x^2 will always come out positive.
So the domain will be all real numbers or (-∞,∞)
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