HSC Mathematics Extension 2 Multiple-Choice Quiz

Try 4 original practice questions. Choose an answer for each question to see your score and the explanations.

1. What is the principal argument of the complex number −1 + i? −3π/4 3π/4 π π/4

2. Which expression equals (2 + i)(2 − i)? 4 5 3 4 − i

3. What is the magnitude of the vector (2, −3, 6)? 11 9 7 49

4. Which expression is an antiderivative of x·eˣ? eˣ (x + 1)eˣ x·eˣ (x − 1)eˣ

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