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1. $x^{2} + k x + 1 = 0$

A. $- 2 < k ⩽ 2$
B. $- 2 < k ⩽ 2$
C. $- 2 < k ⩽ 2$
D. $- 2 < k ⩽ 2$

Answer: Option C

Explanation:

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