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1 vote
Plz solve this question mhanifa

Plz solve this question mhanifa-example-1

1 Answer

3 votes

Answer:

  • Option D

Explanation:

Given:

  • f(x) = 1/ (x - 3)
  • g(x) =
    √(x+5)

The composite function f · g(x) is:

  • f(g(x)) = 1 / (
    √(x+5) - 3)

Restrictions are:

  • x + 5 ≥ 0 ⇒ x ≥ - 5

and


  • √(x+5) ≠ 3 ⇒ x + 5 ≠ 9 ⇒ x ≠ 4

Combination of the above gives us the domain:

  • x ∈ [ - 5, 4) ∪ (4, +∞)

Correct choice is D

User Bing Ren
by
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