利用定积分定义计算积分:[tex=3.786x2.786]uOIEd5z4mI/djBdkQi7n1tWoprdecRE+S5Vs+z2iVhg7qKTEBHxLta79Osri8Sgn[/tex]
解：函数 [tex=0.929x1.0]rmHJiJ/yPbR8dOlOOZGVtjOrvquxaPUWk6b24O3WCFw=[/tex] 在 [tex=2.0x1.357]pL+9s9nh77uX8/Gl5SRykA==[/tex]上连续, 用点 [tex=11.0x1.214]FikxJJ6Bk7wPoCnTGOR/H+Q7oYkd0Pgt+QfKWGx4sHY=[/tex] 将区间 [tex=2.0x1.357]pL+9s9nh77uX8/Gl5SRykA==[/tex] 等分为 [tex=0.643x0.786]/he/ol8BkDuTTL9yMPtH4Q==[/tex]个小区间 [tex=4.0x1.357]Ig7oziIsVS5oxGVOKDeYL6waUZco+S5c/WRxtznCcAs=[/tex] 区间长度为 [tex=9.857x2.357]jZ4YEsz0rttipQTQM2pmH5sJObpLYCZ06X0LV1GKFUItvD6g60pIKA7sJhceF4OV[/tex] 在区间 [tex=4.429x2.786]GGFJKXYJfAq36jsN/9+EWULKaisbo4UvxWm89V8VGUwAUPsqKsT/z8os4BVjNaT5[/tex] 上取点 [tex=2.929x2.357]/J7WPIMxpFzpdjW+sFONh+0aatnIHFsFer6uLIKVKrM=[/tex] 则 [tex=10.143x2.357]x4r3K9KZiBonfF3EynevTXCqzFKEacoVV1uG1nd2BKA3hWVor/kaMf+ouqskFDLEpgNEqK0okyo7/Rb3D4Hl6H/WnpRwhVNFg8aeFUh+we84Tmwt7wLlfE3Q7txVOJfs7UMokjO1zI3J5HwQ+DFImg==[/tex] [tex=10.071x3.286]tDxcEOuOLnXi/OaHnpvpfLjKXdN2ImqdkdDci9cZWlsuYcGUU4fq1GKQwszJ3jKgeduWV2jHMrmgxhKd/DEmRtotNVzqfRn2eNyxv5H0s/NVnAqSRu/k8i9SQowtGAi9[/tex][tex=17.0x3.286]b24Y8Xv6D7nEhvctb776pYl0rutwEXtP+KWjd4bK2+XZHpWOWWRk0jfqoBD3Op2DbXylU32frQ/jbHhN+EcwKAjnj+9LN6B7HcrovENb3uHWX/p6gbIPg+ign1EQgVQu8pNnbAtWDcdoW36BW5SdDLWzCf0+98aDNeHsnO1xL0qhwKAASusqTTQm2k4+fHSrYQCr8wEqey4c77SbzA9MaDL22vUM3IXA0M768bYY4SdkSWv9E8EOVaUNRVP71E+lz9s0fbxy4peKWWJhK1dAH6WcPMo/f00sMorc61EpSek=[/tex][tex=20.929x4.286]Rk2UgWeOHBPFfUpRgzCOlhY9szOxunUHHAijEN0huTq09XQyINnemSS3uS6T298/MTqHUTbgYl3lG9tznQuHQJTs8rvSqiZs0dEFJHT3F0c8OGvI0BK4nKtwON1/ExFQqYhK+dBHEUuO1NBsGqXuCkwFBY3nFLcCutCxl4t3JEeadhtzLV9h2SjR6l2716/DNK2VqRrapux0OqZuNuQiedZZUImq9WTx752SI/d3lq0XT/Crn3XzbkBrE6G0gdc3Hae3LLTnapgaN14En68sqETzLRBjQMXze4044PaQO4e9rpwFeBeuZLgOHJsWvKum+ibgssPf2AgWfeweF1jWTWBfag1/7zBUDJmzQezEey75gxmgUsh+Ea+THga8BtlMidODn2KvtaWaSQxScz3Gog==[/tex][tex=7.071x2.786]QNIBJwfdCdrZG0hbkoEhf1S2SBvd5Q0cwKOHW21cVWp/fn8FzfA5gIg9ljCsd35S1ZOyM/iUIDdKS3h9LlX6WubpVjf2FioZ3wpzX5eXKEw=[/tex]
举一反三
- 应用定积分的定义计算下列定积分：[tex=3.786x2.786]3NTxeZA0AGyQzisyvgBRyqWIclDtZWJk4OmfY2Lqz68=[/tex]
- 利用定积分的定义求下列积分：[tex=3.786x2.786]u2dVEpt0qOH+DE1hPAxBOeLmJ5xZmH9Oa/35d3DetqXLqg4rBZiQM4YG90CAUVRC[/tex]
- 利用定积分定义计算下列定积分[tex=3.5x2.857]R+SIBvE6ixOEcSn8sW+Lml+67yAORT39nsjajnifOd0=[/tex]
- intx=5,y=8,z=7;表达式z=!(x>y)||(x=1,y=3)计算后的结果 A: x=1,y=3,z=1 B: x=1,y=3,z=0 C: x=5,y=8,z=0 D: x=5,y=8,z=1
- 利用定积分的定义计算下列定积分：[tex=6.0x2.786]IMwfrudjLAdHki0E40pIyWsVh7vR5qgQmroDKnlAJxw=[/tex]
内容
- 0
利用定积分的定义计算下列定积分[tex=3.429x2.857]NZXJeG4suSiMRNe2mw0XJGkCVR8m4QPW5rYobzTSYm4=[/tex]
- 1
下列程序段的执行结果是（ ）。 x = 5: y = 7: z = 8 If x < y Then t = x: x = y: y = t End If If y < z Then t = y: y = z: z = t If x < y Then t = x: x = y: y = t End If End If Print x, y, z A: 8 5 7 B: 8 7 5 C: 5 7 8 D: 7 5 8
- 2
利用定积分的定义计算下列积分：[tex=6.071x2.5]Had+ykD8E4tIkBiPsniTsfJpF9wq4G0ca6yMl46240s=[/tex]；
- 3
利用定积分定义计算下列积分：[tex=6.357x2.5]Had+ykD8E4tIkBiPsniTsVkYucbOx25b8gS//THPxBA=[/tex]
- 4
下列哪条语句是正确的（ ） A: A=[1 2;3 4];B=[3;7];A.*B; B: A=cell(2,3);A(1,2)=[4;5]; C: A=[2 3 5 7;9 4 6 1;7 3 2 5];B=[1 7;0 5];A(2:end,2:2:end) D: x=-5:5;y=-5:5;z=x.*x-y.*y;surf(x,y,z);