计算定积分[tex=7.214x2.786]/2GFao47NM0IuCyxoLtKRqIBjReFjuRD7doocOFm7R/tNF9Q2Irzir+cR2bbFiat[/tex].
举一反三
- 定积分 [tex=7.214x2.786]WdYFOXfG5nnGW/WgiEfXS5TgSbC/oF1MRp/6H8KOnmKg/kgj7C6k4LHGjG3GAitV/7dsLPk/KT/eRmxWcJluPg==[/tex]. A: 2 B: -1 C: 1 D: 0
- 在MATLAB中,用命令x=1:9生产数组x。现在要把数组x的第2个和第7个元素都赋值为0,键入的指令是( ) A: x([2 7])=(0 0) B: x([2 7])=[0 0] C: x[(2 7)]=[0 0] D: x[(2 7)]=(0 0)
- 【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]
- 计算定积分:[tex=7.786x2.857]0/s99GuIxVkJasHJxKho2bgvu9NVkzBD3Z6G2ZaHay8x52tJXYQkdIoOGKLGf1AxQ204PEEIjxD6woe37zlUBmsATUtotd77Z9Iu8Za4Mdw=[/tex]。
- 下图所示机构自由度计算,( )是正确的。 A: mg src="http://p.ananas.chaoxing.com/star3/origin/cb07ca0fb12be985c301490389c1e187.jpg" B: F=3×7 –(2×9 + 2 – 2)– 2 = 1 C: F=3×7 –(2×9+ 2– 0)– 0 = 1 D: F=3×7 –(2×8+ 2 – 0)– 2 = 1 E: F=3×5 –(2×6+ 2– 0)– 0 = 1