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N = (lg ((0.9931 (1 - 0.4277))/(0.4277 (1 -0.9931))))/ (4.6* (56.5 /335.9)) - 1
N = (lg ((0.9931 (1 - 0.4277))/(0.4277 (1 -0.9931))))/ (4.6* (56.5 /335.9)) - 1
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