辽宁省鞍山市2022届普通高中高三下学期第二次质量监测数学试题答案
答案第1页共4页参考答案及评分标准1.A2.D3.B4.B5.B6.C7.D8.C9.BD10.AB11.ACD12.ABC13.14.15.ф16.ா+=Ϲ(ߚߛ≠ϸ)17.解(1)߈(ߚ)=−фߕߋߐߚ−߅ߑߕߚ=−ߕߋߐ(ߚ+ಝீ)··································2分令−ಝ+Ϻߍ≤ߚ+ಝீ≤ಝ+Ϻߍ,则−ಝ+Ϻߍ≤ߚ≤ಝ+Ϻߍɧߍٖ߂所以,单调减区间是[−ಝ+Ϻߍɧಝ+Ϻߍ]ɧߍٖ߂.·····································5分(2)由߃−߄=߃߅܊ౚ...
2024-10-16
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