Question

Find the domain of each function

51. f(x)=5x+4
52. f(x) = x^2 +2
53. f(x) = x/x^2+1
54. f(x) = x^2/ x^2 +1

Answer 1

51. all real numbers
52. all real numbers
53. (-infinity, 0)(0,infinity)
54. all real numbers