The maximum number of real roots of the equation \( x^{2 n}-1=0 \) (A) 2 (B) 3 (C) \( n \) (D) \...

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The maximum number of real roots of the equation \( x^{2 n}-1=0 \)
(A) 2
(B) 3
(C) \( n \)
(D) \( 2 n \)
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