应用梯形法公式近似计算定积分[tex=8.071x2.429]/gTipYodITWi1ZaplQ4Cs2rCLQ5WPfXFP3dwxEVGGNMs3z9DOK9jX8TWGGraiLyq[/tex]，并估算其误差。

证明： 若[tex=11.714x2.643]StZ9E2nb7lqiV+ifxPtI7kOkgEEFUaS57IXqv9GfD9JM3Le9Wzxp7rqfMlTg5ffN[/tex]则当[tex=4.429x1.286]kDYQ0ZvUqEjp9b0R+cg2cw==[/tex] 时, 有[br][/br][tex=11.286x2.643]2sVi0FvWEkVgWBa3acS1/3FKeyY4o6Gr2XhX1cifoYRf+ZGdnRrJ0Kz+bAP6U/VMhP9TDr+b31ZLet3+i7m0aQ==[/tex][tex=8.071x2.429]4IyV94iPDdLbQBUOHXjpBtF0vpqGR0IAg2n3pk1lsTE=[/tex] [tex=9.071x2.643]rcP9TNml4j8xMWwxGGWtBvmaQicKnSfcn+HThrp2Gp4dUHs4Sh5WTm/RsplIEX/w[/tex][tex=8.071x2.429]pp0DA6qIjM6WaIucouOvAXEAB1N2vHbPXaxy4Lwaklk=[/tex][tex=6.786x1.357]JXrwkQvCMRwh+ZVvMY4feTeWyMoD1LzOnZai/Zsh4Qc=[/tex][br][/br]

求下列[tex=0.5x0.786]gdMkE6SnyZedYLxpUxdkaQ==[/tex]函数的反变换（[tex=2.357x1.0]7uYv/Vl6CBg9JTOroBoExw==[/tex]）。[tex=8.071x2.429]b5mSSTuf0rlXnj3vtPVYILfQMMTGikwJnvvxTfsaooVVybq0pfd6S9atoV7pP+XdBtoh3j+YnUO+q7Llede9pA==[/tex]

(1)若[tex=6.714x2.643]HAFmghCxhVjDugagN7AdBCsxNb/S0qrLYqWSkSibKUw=[/tex],[tex=4.429x1.214]M6UPYoezKqaZY1gUDuz6wg==[/tex], 则[tex=10.214x2.429]kD803vtlkypFOBFWPml50htCrIFAkCE+J5AkwXdV9zxvsK8WLlo4+JquCHEpAbSg[/tex][br][/br](2)若[tex=11.714x2.643]StZ9E2nb7lqiV+ifxPtI7kOkgEEFUaS57IXqv9GfD9JM3Le9Wzxp7rqfMlTg5ffN[/tex]则当[tex=4.429x1.286]kDYQ0ZvUqEjp9b0R+cg2cw==[/tex] 时, 有[br][/br][tex=11.286x2.643]2sVi0FvWEkVgWBa3acS1/3FKeyY4o6Gr2XhX1cifoYRf+ZGdnRrJ0Kz+bAP6U/VMhP9TDr+b31ZLet3+i7m0aQ==[/tex][tex=8.071x2.429]4IyV94iPDdLbQBUOHXjpBtF0vpqGR0IAg2n3pk1lsTE=[/tex] [tex=9.071x2.643]rcP9TNml4j8xMWwxGGWtBvmaQicKnSfcn+HThrp2Gp4dUHs4Sh5WTm/RsplIEX/w[/tex][tex=8.071x2.429]pp0DA6qIjM6WaIucouOvAXEAB1N2vHbPXaxy4Lwaklk=[/tex][tex=6.786x1.357]JXrwkQvCMRwh+ZVvMY4feTeWyMoD1LzOnZai/Zsh4Qc=[/tex]由(1)(2)计算 [tex=4.857x2.643]t4XYGFjAgTwQ5Qkt2abPq5ZkWilqyozsEtRh91jTu4c=[/tex]

已知：Δ(6,13)=3.125 MeV，Δ(7,13)=5.345 MeV，质子的质量过剩为7.289 MeV，中子的质量过剩为8.071 MeV，计算13C与13N的结合能之差约是多少 A: 3 MeV B: 4 MeV C: 5 MeV D: 6 MeV

己知模拟滤波风的系统函数如下:[tex=8.071x2.429]CJth7xczBV89lyEHA1iTt7HgqhgnXl2eQSNTWEoAV4fxkdGrANgePWyhdJlAuBeK[/tex]用脉冲响应不变法和双线性变换法将其变换成数字滤波器[tex=2.071x1.286]RmhpoXHV0HsiHu4rXqr4mA==[/tex]，改采样间隔[tex=3.0x1.286]6Tr+IifUgE8gaMTfhlL3EA==[/tex]

下列变量组（）是一个闭回路。 A: {x，x，x，x，x，x} B: {x，x，x，x，x} C: {x，x，x，x，x，x} D: {x，x，x，x，x，x}

以下谓词蕴含式正确的是（）: (∀x) (A(x)→B(x))=>( ∀x)A(x)→(∀x)B(x)|(∀x) (A(x)↔B(x))=>( ∀x)A(x)↔(∀x)B(x)|(∀x)A(x)∨(∀x)B(x)=>( ∀x) (A(x)∨B(x))|(∃x) (A(x)∧B(x))=>(∃x)A(x)∧(∃x)B(x)

以下谓词蕴含式正确的是（）: (?x) (A(x)→B(x))=>( ?x)A(x)→(?x)B(x)|(?x) (A(x)?B(x))=>( ?x)A(x)?(?x)B(x)|(?x)A(x)∨(?x)B(x)=>( ?x) (A(x)∨B(x))|(?x) (A(x)∧B(x))=>(?x)A(x)∧(?x)B(x)

下列式中错误的是： A: (∀x)(A(x)Úp(x)) Û (∀x)A(x)Ú (∀x)p(x) B: ($x)A(x) Ù p Û ($x)(A(x) Ù p ) C: (∀x)(A(x)ÚB(x)) Þ (∀x)A(x)Ú( ∀x)B(x) D: ($x)(A(x)ÙB(x)) Þ ($x)A(x)Ù( $x)B(x)