组卷网>知识点选题>方程法判断函数零点(个数)
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| 共计 287 道试题
多选题 | 较难(0.4) | 2022·全国高三专题练习
1 . 已知函数eqId0cb2147a6bc14d34a88b4e0565ef910c,则下列命题正确的是(   )
A.eqId10852d81bc184140a7780250c82c6929eqIda8e841dc5ef24851b7df5ca0cc3d85e2上是增函数
B.eqId10852d81bc184140a7780250c82c6929的值域是eqId1f0bdf0905964de69974073a47e88e98
C.方程eqIdccebcf931eb6405e9770abc0fc2fa85c有三个实数解
D.对于eqId735b8047beee4dee870fc72ae837a245eqIdecaaaffea9af458c8e6dff16f15c1a73eqId70c08d40596445378a3ebc3942e99852)满足eqId361ede8b18114ff68299431749d1b1b6,则eqIda973bcaa3c9c4cc3876ba350b9e4e0c8
2 . 若方程eqId46c678b9ba444eb28f3c92622724083c至少有一个实数解,求a的取值范围.
单选题 | 较易(0.85) | 2022·全国
4 . 以下函数在区间(0,eqId49b7b111d23b44a9990c2312dc3b7ed9)上必有零点的是(   )
A.yeqId87b2e9b67acd488b84423101ad47f1edB.yeqIda0ec1b12db2f49438bcd217088eaf52cC.y=ln(x+eqId7f1f28503f41439586d8e228365897e9D.y=2x+1
更新:2021/09/20组卷:99
单选题 | 一般(0.65) | 2021·广西(理)
5 . 已知函数eqIdf244a2599f574f2f8c8c41b5e8984a71eqIdc029a9c3753742f39c467e32e2e889b5上的零点个数为(   )
A.eqIdddd35c5d043e4ebeac32a99367053c68B.eqId8f65c930571d4ff6aa6a50029d46826eC.eqIdecb828cf922546bb9760e0ce5c95a9cbD.eqId401586f7a7f248b7904a4cfeaa2ed2f0
单选题 | 容易(0.94) | 2021·徐闻县第一中学
7 . 函数eqId58c4f3f487034da8a3a234ba4cd416eb的零点是(   )
A.eqId49b7b111d23b44a9990c2312dc3b7ed9,1B.eqId5b474c79f9454f5b96598f7e0ef1a01aC.eqIdfcc58431683b452ca65d1d9977a280bd,-1D.eqId13543e0525434ecd869f67a6e184f814
知识点:
9 . 已知函数eqIdea5dfcf1d03846bb93b6d0fd462a87c9是定义在eqId7dcd2312d0bf4bb1befdfcc170e45791上的奇函数,当eqIdaa1312dcc8e24925b421f7767761a363时,eqId4104918408a048e597c9c34299224535,给出下列命题:
①当eqId4db620a5946b4ee0a9f530f35a6d505a时,eqId1453916afe0c47a69e7ed7bd8c1ef18b
②函数eqIdea5dfcf1d03846bb93b6d0fd462a87c9eqIdc052ddfbd4524f67a79e0e77c2e5656a个零点;
eqId0d3680f6c70744818eac9476fb46fd9beqIdd120eb4ac48d4e31a122a75642111f80,都有eqIdab279a5b877a4de2b5938053b2198056
eqId0b62078c959146aaa34391caae0194db的解集为eqId342383661e0243b2a2853d20d4afc70e
其中正确的命题是____________
10 . 函数eqId538f186f64334f06924955e17c4dd6d6在区间eqIde527fce3f6a04dceafb1831d814e12bd上的零点个数为(   )
A.2B.3C.4D.5