1d ) I think but here 12 also satifies so ???[7]
if (√3+i)n=2n then n is
a) an integral multiple of 12
b)an integral multiple of 5
c)an integral multiple of 8
d)none
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5 Answers
106(2eiπ/6)n = 2n
==> einπ/6 = 1
==> cos(nπ/6) + isin(nπ/6) = 1
==> cos(nπ/6) = 1 and sin(nπ/6) = 0
==> nπ/6 = 2mπ and nπ/6 = nπ
==> n = 12m
(a)