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AHSME 1974 Problem 17

    If i2=−1i^2=-1, then (1+i)20−(1−i)20(1+i)^{20}-(1-i)^{20} equals (A) −1024(B) −1024i(C) 0(D) 1024(E) 1024i\mathrm{(A)\ } -1024 \mathrm{(B) \ }-1024i \mathrm{(C) \ } 0 \mathrm{(D) \ } 1024 \mathrm{(E) \ }1024i

    Dataset text NuminaMath-1.5. Quoted with source.

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