Perform the Requested Operation or Operations $$f ( x ) = \sqrt { x + 6 } ; g ( x ) = \cos x$$

question 159

Multiple Choice

Perform the requested operation or operations. Find the domain of each.
- $$f ( x ) = \sqrt { x + 6 } ; g ( x ) = \cos x$$
Find $f - g$ .

• A) \(\sqrt { x + 6 } + \cos x\); domain: \([ - 6 , \infty )\)
• B) \(\frac { \cos x } { \sqrt { x + 6 } } ;\) domain: \([ - 6 , \infty )\)
• C) \(( \cos x ) ( \sqrt { x + 6 } )\); domain: \([ - 6 , \infty )\)
• D) \(\sqrt { x + 6 } - \cos x\); domain: \([ - 6 , \infty )\)

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