第四章测试
1. ,则 的( )
A:跳跃间断点 B:振荡间断点 C:可去间断点 D:无穷间断点
答案:C
2. 设 ,要使 上连续,a=( )
A:2 B:0 C:-1 D:1
答案:B
3. .w68214607968s .brush0 { fill: rgb(255,255,255); } .w68214607968s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w68214607968s .font0 { font-size: 473px; font-family: Symbol, serif; } .w68214607968s .font1 { font-size: 406px; font-family: "Times New Roman", serif; } .w68214607968s .font2 { font-style: italic; font-size: 262px; font-family: "Times New Roman", serif; } .w68214607968s .font3 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w68214607968s .font4 { font-size: 242px; font-family: Symbol, serif; } .w68214607968s .font5 { font-size: 373px; font-family: Symbol, serif; } .w68214607968s .font6 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } ( ) lim x fxa ®-¥ = ,则 .w68214607945s .brush0 { fill: rgb(255,255,255); } .w68214607945s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w68214607945s .pen1 { stroke: rgb(0,0,0); stroke-width: 16; stroke-linejoin: round; } .w68214607945s .font0 { font-size: 262px; font-family: "Times New Roman", serif; } .w68214607945s .font1 { font-size: 406px; font-family: "Times New Roman", serif; } .w68214607945s .font2 { font-style: italic; font-size: 262px; font-family: "Times New Roman", serif; } .w68214607945s .font3 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w68214607945s .font4 { font-size: 190px; font-family: Symbol, serif; } .w68214607945s .font5 { font-size: 242px; font-family: Symbol, serif; } .w68214607945s .font6 { font-size: 373px; font-family: Symbol, serif; } .w68214607945s .font7 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 0 1 lim x f x - ® æö = ç÷ èø ( )
A: .w68214607989s .brush0 { fill: rgb(255,255,255); } .w68214607989s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w68214607989s .font0 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w68214607989s .font1 { font-size: 373px; font-family: Symbol, serif; } .w68214607989s .font2 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } a - B: .w68214607992s .brush0 { fill: rgb(255,255,255); } .w68214607992s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w68214607992s .font0 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w68214607992s .font1 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } a C: .w68214607970s .brush0 { fill: rgb(255,255,255); } .w68214607970s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w68214607970s .pen1 { stroke: rgb(0,0,0); stroke-width: 16; stroke-linejoin: round; } .w68214607970s .font0 { font-size: 406px; font-family: "Times New Roman", serif; } .w68214607970s .font1 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w68214607970s .font2 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 1 a D: .w68214607948s .brush0 { fill: rgb(255,255,255); } .w68214607948s .pen0 { stroke: rgb(0,0,0); stroke-width: 1; stroke-linejoin: round; } .w68214607948s .pen1 { stroke: rgb(0,0,0); stroke-width: 16; stroke-linejoin: round; } .w68214607948s .font0 { font-size: 406px; font-family: "Times New Roman", serif; } .w68214607948s .font1 { font-style: italic; font-size: 406px; font-family: "Times New Roman", serif; } .w68214607948s .font2 { font-size: 373px; font-family: Symbol, serif; } .w68214607948s .font3 { font-weight: bold; font-size: 76px; font-family: System, sans-serif; } 1 a -
答案:B
4. 下列极限存在的是( )
A: B: C: D:
答案:D
5. 函数 在点 点的左极限是( )
A:-1 B:1 C:不存在 D:0
答案:D

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