Question

Which of the following functions have a domain of all real numbers? Select all that apply. f(x) = log(x + 7) f(x) = \frac{x^3}{x^2 + 4} f(x) = 4arctan(x) f(x) = 6e^{x+4} f(x) = cos^2(7x) f(x) = 4 - x^{11}

          Which of the following functions have a domain of all real numbers? Select all that apply.
f(x) = log(x + 7)
f(x) = \frac{x^3}{x^2 + 4}
f(x) = 4arctan(x)
f(x) = 6e^{x+4}
f(x) = cos^2(7x)
f(x) = 4 - x^{11}

Which of the following functions have a domain of all real numbers? Select all that apply.
f(x) = log(x + 7)
f(x) = (x^3)/(x^2 + 4)
f(x) = 4arctan(x)
f(x) = 6e^x+4
f(x) = cos^2(7x)
f(x) = 4 - x^11

Added by Paul C.

Precalculus with Limits

Ron Larson 2nd Edition

Instant Answer

Solved by Expert Yujie Wang

Step 1

- f(x) log(x + 7): The domain of log(x) is all positive real numbers, so the domain of log(x + 7) is all real numbers greater than -7. Show more…

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Which of the following functions have a domain of all real numbers? Select all that apply. f(x) = log(x + 7) f(x) = x^3 f(x) = x^2 + 4 f(x) = 4arctan(x) f(x) = 6e^(x+4) f(x) = cos(7x) f(x) = 4 - |x|