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提示:本试卷有40个问题,尽你所能给出回答,每题选卷面中一个答案,但不允许多于一个。错误答案不扣分。所有题目的分值相同。允许没有计算过程。 1、设n为满足方程3x+2y=881有序整数对(x,y)的数目,则(a)n≤100,(b)101≤n≤115,(c)116≤n≤130,(d)131≤n≤145,(e)n≥146
Tip: This paper has 40 questions. Do your best to give an answer. Choose one answer for each question, but not more than one. The wrong answer is not deducted. Scores are the same for all topics. Allow no calculation process. 1. Let n be the number of (x,y) pairs satisfying the equation 3x+2y=881, then (a)n≤100, (b)101≤n≤115, (c)116≤n≤130, (d) 131 ≤ n ≤ 145, (e) n ≥ 146