Post-UTME Mathematics 2016 Objective — Question 15
Question 15 of 60 from the Post-UTME Screening (Post-UTME) Mathematics 2016 Objective paper, with the correct answer and a full explanation.
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Number Systems 5. If x² + 1 = 0, then x = ?
- A. 1
- B. i
- C. ±1
- D. ±iCorrect
Explanation
x² = -1, so x = ±√-1 = ±i.
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