23
practice examMultiple Choice

Practice Exam

Question 23 • Algebra II

The domain of u times x is the set of all real values except 0 and the domain of v times x is the set of all real values except 2 What are the restrictions on the domain of open paren u circ v close paren times x ?

Answer
A
x is not equal to 2 and x cannot be any value for which v times x is equal to 0
B
u times x is not equal to 2 and v times x is not equal to 0
C
x is not equal to 0 and x cannot be any value for which u times x is equal to 2
D
u times x is not equal to 0 and v times x is not equal to 2

Explanation

For (u ∘ v)(x) = u(v(x)), first x must be in the domain of v, so x ≠ 2. Then v(x) must be in the domain of u, which excludes 0, so v(x) ≠ 0. These are exactly the restrictions in choice A.

AI-written and checked against the verified answer.

Previous
Next