jawab pakai cara ... yyy

(1 - 1/3)(1 - 1/4)(1 - 1/5)(1 - 1/6) .... (1 - t/2015)(1 - t/2016) = n- 2013/2015

2/3.3/4.4/5.5./6. .... .{(2015-t)/2015}.
{(2016-t)/2016} = n- 2013/2015

2/2016 = n - 2013/2015



n = 2/2016 + 2013/2016
n = 2015/2016

D. 2015/2016

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