\(B=\dfrac{2017\times2018+1000}{2017\times2018+2018-1018}\\ B=\dfrac{2017\times2018+1000}{2017\times2018+1000}\\ B=1\)
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\(B=\dfrac{2017\times2018+1000}{2017\times2018+2018-1018}\\ B=\dfrac{2017\times2018+1000}{2017\times2018+1000}\\ B=1\)