假设函数[tex=12.357x1.571]uAEyfspjewsilX5675tTfdFHCb4a9YpiQASslGzK1tAFRcUDKXHRYD/cebOHj5zbFARovO1Kqr4uaGNKNnxUTybLhh0Xh7v/FG7yUwv9ERg7SbMnFnlqOzM+5cEpPYQf[/tex]，且存在非零常数A,B和b>0，使得[tex=18.429x2.214]u5Ei/jC+B48Hely8KmsjTKNOgqedFiZ4jWZaux4Qzxef2Be/WfPYlxGQGdHFAZEp0SbN7Bnbh1IpeNyvSHxXVTQVO6x5LY0F4JJO7nMDE8soiH3FXYcSdWsxYDjvgDjIAT6EQq0crpiu3zM7o8QO4g==[/tex]，证明一维波动方程初值问题[tex=19.786x3.357]fnpmC2J6JmQBLyo5NmGAzz1EEFvh0W+KMVB3PRTO6PCr+9Cu2nJO0+TLZ61SGNhKW9jKfd7HgXX0/9r3C4By6AWNgiiUyyT2F6C1M3jE5gSUUGTbal6F2v3yOrGogu2y3YxKbsrSRV70py367LhEWadddt7juSMStXLOxIDOWTj/VC6nY/avghHtwmCEDMYtLD0CbqraO2W1glBpBpcZgA==[/tex]的解u=u(x,t)满足：存在常数c，使得[tex=7.571x2.0]aQeshb8uwXT2rSAknc2RhUhDp0yVFK0kA0m5HWkd2GZeW72KX3pvv4u9jmoqFghq[/tex]，并且确定该常数c.
举一反三
- set1 = {x for x in range(10)} print(set1) 以上代码的运行结果为？ A: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} B: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10} C: {1, 2, 3, 4, 5, 6, 7, 8, 9} D: {1, 2, 3, 4, 5, 6, 7, 8, 9,10}
- 【计算题】5 ×8= 6×4= 7×7= 9×5= 2×3= 9 ×2= 8×9= 7×8= 5×5= 4×3= 5+8= 6 ×6= 3×7= 4×8= 9×3= 1 ×2= 9×9= 6×8= 8×0= 4×7=
- 下面语句的输出结果是？range(len('HelloWorld')) A: [1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11] B: 11 C: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] D: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
- 【单选题】Which of the following matrices does not have the same determinant of matrix B: [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -1, 0, -9,-5] A. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 0; -1, 0, -9, -5] B. [1, 3, 0, 2; -2, -5, 7, 4; 1, 0, 9, 5; -1, 0, -9, -5] C. [1, 3, 0, 2; -2, -5, 7, 4; 3, 5, 2, 1; -3, -5, -2, -1] D. [1, 3, 0, 2; -2, -5, 7, 4; 0, 0, 0, 1; -1, 0, -9, -5]
- 下面是图的拓扑排序的是？(多选)[img=340x240]1802faef6ebcc2a.png[/img] A: 2 8 0 7 1 3 5 6 4 9 10 11 12 B: 2 8 7 0 6 9 11 12 10 1 3 5 4 C: 8 2 7 3 0 6 1 5 4 9 10 11 12 D: 8 2 7 0 6 9 10 11 12 1 3 5 4