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Let α be a real number,x≥A≥2, e(θ) = e<sup>2πiθ</sup>, Λ(n) be Mangoldt’s function, and S(α; x, A) = sum from x-A【n≤x (Λ(n)e(nα).In this paper, the two following results are proved by a purely analytic method. (i) Let ε bean arbitrarily small