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If 1,alpha1,alpha2, dotalpha(2016) are (...

If `1,alpha_1,alpha_2, dotalpha_(2016)` are `(2017)^(t h)` roots of unity, then the value of `sum_(r=1)^(2016)r(alpha_r+alpha_(2017-r))"equals"` `-2016` (b) `-2017` 2017 (d) 2016

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