SOLUTION: Find the domain of these functions. f(x)=7-x^2 g(x)=2x+1/x-1 f(x)=sqrt(x-5) g(x)=sqrt(2x^2+3)

Algebra ->  Functions -> SOLUTION: Find the domain of these functions. f(x)=7-x^2 g(x)=2x+1/x-1 f(x)=sqrt(x-5) g(x)=sqrt(2x^2+3)      Log On


   

Question 1124273: Find the domain of these functions.
f(x)=7-x^2
g(x)=2x+1/x-1
f(x)=sqrt(x-5)
g(x)=sqrt(2x^2+3)
Answer by solver91311(24713) About Me  (Show Source):
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The domain of any polynomial function with real coefficients is the entire set of real numbers.

The domain of any rational function is the set of real numbers excluding any value that would make any denominator equal to zero.

The domain of a function containing a radical is the set of real numbers excluding any values that would make the radicand strictly less than zero.

John

My calculator said it, I believe it, that settles it