小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com2026届高中毕业班适应性练习（四月）数学参考答案及评分细则评分说明：1．本解答给出了一种或几种解法供参考，如果考生的解法与本解答不同，可根据试题的主要考查内容比照评分标准制定相应的评分细则。2．对计算题，当考生的解答在某一步出现错误时，如果后继部分的解答未改变该题的内容和难度，可视影响的程度决定后继部分的给分，但不得超过该部分正确解答应给分数的一半；如果后继部分的解答有较严重的错误，就不再给分。3．解答右端所注分数，表示考生正确做到这一步应得的累加分数。4．只给整数分数。选择题和填空题不给中间分。一、单项选择题题号12345678答案ACDCCBCD二、多项选择题题号91011答案BCDADACD三、填空题12．60°13．14．四、解答题15.本小题主要考查函数的奇偶性、函数的零点、三角恒等变换、等差数列求和等基础知识，考查运算求解能力、逻辑推理能力等，考查函数与方程思想、分类与整合思想等，考查逻辑推理、数学运算等核心素养，体现基础性.满分13分.解法一：（1）因为为奇函数，所以，··························································1分即恒成立.得恒成立，···············································································2分所以恒成立，···············································3分所以恒成立，····························································································4分小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com所以，···········································································································5分解得.········································································································6分（2）因为，所以，令，则，·················································································8分所以或，·················································10分解得或，································································11分令，，则，所以，··································12分所以．·······················································13分解法二：（1）因为为上的奇函数，所以，························································2分所以，···········································································································3分解得，·····································································································4分经检验，是奇函数，所以.····················...