证明方程 [tex=5.643x2.643]veMIbIHrCKyfJD6p8CsZieV/mC7jauoF+RoXvFL11rxcZNCHFWI1bp9PcV7QjXfuLz8jFJG3FjoRv6p+Zfkmnw==[/tex] 经变换 $x y=u$ 可化为变量分离方程,并由此求解方程：[tex=8.429x1.571]8HRcqzX3v4Y2lj/bxKtUWyTaeJGkmxPo/lnb2KrFyUkh3bTJjq7hgObaU0hI8NF68rCBoV64ntgfXyGigpHhLQ==[/tex]

[tex=8.429x1.571]upS1OQ+NqV5GrHDGdKIe4b8Y/suoVhtKxaE7TNJr2CneVBW5uVJ18CmIcNzjFtQC[/tex]求[tex=1.571x1.5]i+T3vPE1S6ygUo6J/9Wcrg==[/tex]

[tex=1.786x1.214]zYqhFHoGk/299AWG1Lg3Bg==[/tex] 的计筫公式为: 未知类型：{'options': ['[tex=8.429x1.571]jffv2rgyEHvdqUK5KGNg2fV+OPD8FW/0NTKr+zCR2PLuMh1wIQKedGgm0dTRA+WjuYdaRD1+QM+j8o7AHx625A==[/tex]', '[tex=9.214x1.5]jffv2rgyEHvdqUK5KGNg2becMT+i5sCA6CgVqdGH36pd7uOt/nsLfLSbEDygZ9B0[/tex]', '[tex=8.786x1.5]jffv2rgyEHvdqUK5KGNg2U/bhsGDyhC4S54UVVfChtX38ktP4EWZPqPYhb/N3JBS[/tex]', '[tex=8.429x1.571]2hUftZP2vRTVbdKlvEv9AnR8aIBMdaW10c7lszTFWVYOanAZjIZcoe9+v1rTU3n6/jyBJOn174w0zTaZdUlUKQ==[/tex]', '[tex=8.5x1.571]jffv2rgyEHvdqUK5KGNg2RNQicJkXoEWHlcm1ca82FURFW/G8WBggvD01qoEodPAAdBuixmVi/St0lAbOneaEg==[/tex]'], 'type': 102}

[tex=1.0x1.0]mqXSIedfIXuT5QAh9Hrzdg==[/tex]位长的浮点数,其中阶码[tex=0.5x1.0]+ElP8Glp1jNyDFWBiVUf/g==[/tex]位(含[tex=0.5x1.0]oYgVDn+QZqcDCRxqEZwM2A==[/tex]位阶符),尾数[tex=0.5x1.0]HNefUrdF8bed/Hc2JSQNOQ==[/tex]位(含[tex=0.5x1.0]oYgVDn+QZqcDCRxqEZwM2A==[/tex]位数符),当采用补码表示时,所能表示的数的范围是[br][/br] 未知类型：{'options': ['[tex=8.429x1.571]9QicpPfbbdbSCSPiOVuOPJrZPeTIRNID3cetFsrU75eK+2xVvFY1QRecniAyCpkq[/tex]', '[tex=8.429x1.571]QuRYol3IeR8l7Z2N56FKFsJDdd7p7hmXLCBH8cnpMGc+pyCHl/PTI4NylT1tNCFn[/tex]', '[tex=8.429x1.571]QuRYol3IeR8l7Z2N56FKFsJDdd7p7hmXLCBH8cnpMGc5U/nxbJJdQAAe/iLrvdLO[/tex]', '[tex=12.214x1.571]dvpRk0U2Ti59lzGmGlUtuEtSp/kqOOJn3tmKcH2AVWth3RYT34wfsaf16p3ocICwe2A5hgp5pTA9ltIeZeyv6g==[/tex]'], 'type': 102}

[tex=1.0x1.0]mqXSIedfIXuT5QAh9Hrzdg==[/tex]位长的浮点数,其中阶码[tex=0.5x1.0]+ElP8Glp1jNyDFWBiVUf/g==[/tex]位(含[tex=0.5x1.0]oYgVDn+QZqcDCRxqEZwM2A==[/tex]位阶符) ,尾数[tex=0.5x1.0]HNefUrdF8bed/Hc2JSQNOQ==[/tex]位(含[tex=0.5x1.0]oYgVDn+QZqcDCRxqEZwM2A==[/tex]位数符),当浮点数采用原码表示时,所能表示的数的范围是[br][/br] 未知类型：{'options': ['[tex=8.429x1.571]9QicpPfbbdbSCSPiOVuOPJrZPeTIRNID3cetFsrU75eK+2xVvFY1QRecniAyCpkq[/tex]', '[tex=8.429x1.571]QuRYol3IeR8l7Z2N56FKFsJDdd7p7hmXLCBH8cnpMGc+pyCHl/PTI4NylT1tNCFn[/tex]', '[tex=8.429x1.571]QuRYol3IeR8l7Z2N56FKFsJDdd7p7hmXLCBH8cnpMGc5U/nxbJJdQAAe/iLrvdLO[/tex]', '[tex=12.214x1.571]dvpRk0U2Ti59lzGmGlUtuEtSp/kqOOJn3tmKcH2AVWth3RYT34wfsaf16p3ocICwe2A5hgp5pTA9ltIeZeyv6g==[/tex]'], 'type': 102}

[tex=8.429x1.571]PiwPQN40FdCoOXwajtbHpq8u3cSXVPVDDgLnIPlxtR4LHTcQfa9yZPEIzplR7PG0J5TgdDzq8qegk/KbwYKhtg==[/tex]的共轭酸是[input=type:blank,size:4][/input]，其共轭碱是[input=type:blank,size:4][/input]。

某标准件厂生产的螺栓长度 [tex=8.429x1.571]rxQtZsSvZoXr1Z57GlzqT63TXZgo7Gm2avU+cd6qB+r502oyR71SOPzoRn3XRSKm[/tex]，若规定长度在[tex=7.143x1.357]7MuRIvekz/fRCNn+vcQ12MjA92aBEiFm6bj77rMpeWM=[/tex]范围内为合格品，从一批螺栓中任取一只，求该螺栓为不合格的概率

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)