CPM Homework Help : CALC Problem 1-202

Find the domain of the following functions: Homework Help ✎
1. f(x) = sec x
2. g(x) = log(x²+ l)

Hint (a):

More Help (a):

When is the cos(x) = to 0?

Hint (b):

Logarithms have restrictive domains: x cannot be less than or equal to 0. What value(s) of x will make x² + 1 ≤ 0?

Answer (b):

D = (−∞, ∞)

Hint (c):

x² - x - 6 ≠ 0

Hint (d):

Both the numerator and the denominator have restricted domains. To find the domain of k(x), all restrictions apply... combine the domains together.