求证: [tex=11.643x2.786]WzCoaZ2NCa2tjKScY9EXhAaQpRaGHKz8OKUjQSg4IMt+6pTd31Wh/4qicvjXtmtIJnd+RltDKzv3nl8qgclltwinOte7hcrpnboerDRZ1DGFU+r4CF/XKZheKcpW/ASA[/tex]
求证: [tex=11.643x2.786]WzCoaZ2NCa2tjKScY9EXhAaQpRaGHKz8OKUjQSg4IMt+6pTd31Wh/4qicvjXtmtIJnd+RltDKzv3nl8qgclltwinOte7hcrpnboerDRZ1DGFU+r4CF/XKZheKcpW/ASA[/tex]
取[tex=11.643x2.786]7P2fiRp2S1+aiSe3LSmSuSYdC/mXHD3iMRMZMHyfHXPPXK8oFSzcr/EleUxjD138+qi7FO3aPm9ZpC+Ye9ox3Id1SWMduz0JLt2LNpIMkEg=[/tex]，验证[tex=11.143x3.357]Uyz5s0rmQIddjb5Jc2T/YRd9exX63872DgLG3it+eRA4jyxpzsJs9AO2ePRWjqmQ+95ZzKqapOzIcjmazd93kP+NZYlc8T5gI0idqk0uF5Yioju9L0whcQd8FCpeDzovJV8oJ5PBLzthJrbGlBK5d3xkG+3DVM6fCyGdNxbwdMTEUAu8lqq1esJFurE6hoI1[/tex]
取[tex=11.643x2.786]7P2fiRp2S1+aiSe3LSmSuSYdC/mXHD3iMRMZMHyfHXPPXK8oFSzcr/EleUxjD138+qi7FO3aPm9ZpC+Ye9ox3Id1SWMduz0JLt2LNpIMkEg=[/tex]，验证[tex=11.143x3.357]Uyz5s0rmQIddjb5Jc2T/YRd9exX63872DgLG3it+eRA4jyxpzsJs9AO2ePRWjqmQ+95ZzKqapOzIcjmazd93kP+NZYlc8T5gI0idqk0uF5Yioju9L0whcQd8FCpeDzovJV8oJ5PBLzthJrbGlBK5d3xkG+3DVM6fCyGdNxbwdMTEUAu8lqq1esJFurE6hoI1[/tex]
取[tex=11.643x2.786]7P2fiRp2S1+aiSe3LSmSuSYdC/mXHD3iMRMZMHyfHXPPXK8oFSzcr/EleUxjD138+qi7FO3aPm9ZpC+Ye9ox3Id1SWMduz0JLt2LNpIMkEg=[/tex]，验证[tex=11.143x3.357]Uyz5s0rmQIddjb5Jc2T/YRd9exX63872DgLG3it+eRA4jyxpzsJs9AO2ePRWjqmQ+95ZzKqapOzIcjmazd93kP+NZYlc8T5gI0idqk0uF5Yioju9L0whcQd8FCpeDzovJV8oJ5PBLzthJrbGlBK5d3xkG+3DVM6fCyGdNxbwdMTEUAu8lqq1esJFurE6hoI1[/tex]
取[tex=11.643x2.786]7P2fiRp2S1+aiSe3LSmSuSYdC/mXHD3iMRMZMHyfHXPPXK8oFSzcr/EleUxjD138+qi7FO3aPm9ZpC+Ye9ox3Id1SWMduz0JLt2LNpIMkEg=[/tex]，验证[tex=11.143x3.357]Uyz5s0rmQIddjb5Jc2T/YRd9exX63872DgLG3it+eRA4jyxpzsJs9AO2ePRWjqmQ+95ZzKqapOzIcjmazd93kP+NZYlc8T5gI0idqk0uF5Yioju9L0whcQd8FCpeDzovJV8oJ5PBLzthJrbGlBK5d3xkG+3DVM6fCyGdNxbwdMTEUAu8lqq1esJFurE6hoI1[/tex]
取[tex=11.643x2.786]7P2fiRp2S1+aiSe3LSmSuSYdC/mXHD3iMRMZMHyfHXPPXK8oFSzcr/EleUxjD138+qi7FO3aPm9ZpC+Ye9ox3Id1SWMduz0JLt2LNpIMkEg=[/tex]，验证[tex=11.143x3.357]Uyz5s0rmQIddjb5Jc2T/YRd9exX63872DgLG3it+eRA4jyxpzsJs9AO2ePRWjqmQ+95ZzKqapOzIcjmazd93kP+NZYlc8T5gI0idqk0uF5Yioju9L0whcQd8FCpeDzovJV8oJ5PBLzthJrbGlBK5d3xkG+3DVM6fCyGdNxbwdMTEUAu8lqq1esJFurE6hoI1[/tex]
取[tex=11.643x2.786]7P2fiRp2S1+aiSe3LSmSuSYdC/mXHD3iMRMZMHyfHXPPXK8oFSzcr/EleUxjD138+qi7FO3aPm9ZpC+Ye9ox3Id1SWMduz0JLt2LNpIMkEg=[/tex]，验证[tex=11.143x3.357]Uyz5s0rmQIddjb5Jc2T/YRd9exX63872DgLG3it+eRA4jyxpzsJs9AO2ePRWjqmQ+95ZzKqapOzIcjmazd93kP+NZYlc8T5gI0idqk0uF5Yioju9L0whcQd8FCpeDzovJV8oJ5PBLzthJrbGlBK5d3xkG+3DVM6fCyGdNxbwdMTEUAu8lqq1esJFurE6hoI1[/tex]
取[tex=11.643x2.786]7P2fiRp2S1+aiSe3LSmSuSYdC/mXHD3iMRMZMHyfHXPPXK8oFSzcr/EleUxjD138+qi7FO3aPm9ZpC+Ye9ox3Id1SWMduz0JLt2LNpIMkEg=[/tex]，验证[tex=11.143x3.357]Uyz5s0rmQIddjb5Jc2T/YRd9exX63872DgLG3it+eRA4jyxpzsJs9AO2ePRWjqmQ+95ZzKqapOzIcjmazd93kP+NZYlc8T5gI0idqk0uF5Yioju9L0whcQd8FCpeDzovJV8oJ5PBLzthJrbGlBK5d3xkG+3DVM6fCyGdNxbwdMTEUAu8lqq1esJFurE6hoI1[/tex]
取[tex=11.643x2.786]7P2fiRp2S1+aiSe3LSmSuSYdC/mXHD3iMRMZMHyfHXPPXK8oFSzcr/EleUxjD138+qi7FO3aPm9ZpC+Ye9ox3Id1SWMduz0JLt2LNpIMkEg=[/tex]，验证[tex=11.143x3.357]Uyz5s0rmQIddjb5Jc2T/YRd9exX63872DgLG3it+eRA4jyxpzsJs9AO2ePRWjqmQ+95ZzKqapOzIcjmazd93kP+NZYlc8T5gI0idqk0uF5Yioju9L0whcQd8FCpeDzovJV8oJ5PBLzthJrbGlBK5d3xkG+3DVM6fCyGdNxbwdMTEUAu8lqq1esJFurE6hoI1[/tex]
取[tex=11.643x2.786]7P2fiRp2S1+aiSe3LSmSuSYdC/mXHD3iMRMZMHyfHXPPXK8oFSzcr/EleUxjD138+qi7FO3aPm9ZpC+Ye9ox3Id1SWMduz0JLt2LNpIMkEg=[/tex]，验证[tex=11.143x3.357]Uyz5s0rmQIddjb5Jc2T/YRd9exX63872DgLG3it+eRA4jyxpzsJs9AO2ePRWjqmQ+95ZzKqapOzIcjmazd93kP+NZYlc8T5gI0idqk0uF5Yioju9L0whcQd8FCpeDzovJV8oJ5PBLzthJrbGlBK5d3xkG+3DVM6fCyGdNxbwdMTEUAu8lqq1esJFurE6hoI1[/tex]
取[tex=11.643x2.786]7P2fiRp2S1+aiSe3LSmSuSYdC/mXHD3iMRMZMHyfHXPPXK8oFSzcr/EleUxjD138+qi7FO3aPm9ZpC+Ye9ox3Id1SWMduz0JLt2LNpIMkEg=[/tex]，验证[tex=11.143x3.357]Uyz5s0rmQIddjb5Jc2T/YRd9exX63872DgLG3it+eRA4jyxpzsJs9AO2ePRWjqmQ+95ZzKqapOzIcjmazd93kP+NZYlc8T5gI0idqk0uF5Yioju9L0whcQd8FCpeDzovJV8oJ5PBLzthJrbGlBK5d3xkG+3DVM6fCyGdNxbwdMTEUAu8lqq1esJFurE6hoI1[/tex]
求出[tex=1.214x1.286]y8DPpGMEWa1a5/64pPER3g==[/tex]的值:[tex=11.643x2.786]PhQXqZ+Xo4kxgU6IIm+Ip5pxpocNLzyQV/k+Wh4PGO5pcDN8W7S/ovYdsSghsDqE[/tex]
求出[tex=1.214x1.286]y8DPpGMEWa1a5/64pPER3g==[/tex]的值:[tex=11.643x2.786]PhQXqZ+Xo4kxgU6IIm+Ip5pxpocNLzyQV/k+Wh4PGO5pcDN8W7S/ovYdsSghsDqE[/tex]
在坐标原点处有一波源,其振动方程为 [tex=6.214x1.214]mFEhZlErdTF1csRqQCUodt90oJtEJIwceo7U7N9P2PE=[/tex], 由波源发出的平面简谐波沿坐标轴 [tex=0.571x0.786]ZKO2xs0EgSemzoH7MSmYTA==[/tex]正方向传播.在距离波源 [tex=0.571x1.0]QDHYLzpRIwhOrWBqGonCgg==[/tex] 处有一平面将波反 射 (反射时无半波损失), 如图[tex=1.786x1.0]v7XcjmxgzbXrYiknCRjjgA==[/tex],则反射波的表 达式为 ( )[img=249x192]17ac8eb0db36f6c.png[/img] 未知类型：{'options': ['[tex=9.643x2.214]JtU4/H/aJeg4SGbNUl9RcGJye9LTvrY/WsdO/R+MrDCPMFuDeH4Or9a32itMiajS8hD5p51O+flJZvkwZXGTig==[/tex]', '[tex=11.643x2.786]JtU4/H/aJeg4SGbNUl9RcJ7FiKFo7SVxHJ7XEWeBYsWAeU/gnIUuegzEtXEE4LF9eRzpn1F+cSLG8stXzHvjVQ==[/tex]', '[tex=11.643x2.786]JtU4/H/aJeg4SGbNUl9RcGJye9LTvrY/WsdO/R+MrDCEYmg4WiA1oSYuNpJQhvztyqIIout20lDzVzjOi8mT8Q==[/tex]', '[tex=12.143x2.786]JtU4/H/aJeg4SGbNUl9RcJ7FiKFo7SVxHJ7XEWeBYsWkVfByBCAezeVKWyxvt1xsUQaXCZUvm39xRQaL3GOvZw==[/tex]', '[tex=11.643x2.786]JtU4/H/aJeg4SGbNUl9RcGJye9LTvrY/WsdO/R+MrDCEYmg4WiA1oSYuNpJQhvztyqIIout20lDzVzjOi8mT8Q==[/tex]'], 'type': 102}
在坐标原点处有一波源,其振动方程为 [tex=6.214x1.214]mFEhZlErdTF1csRqQCUodt90oJtEJIwceo7U7N9P2PE=[/tex], 由波源发出的平面简谐波沿坐标轴 [tex=0.571x0.786]ZKO2xs0EgSemzoH7MSmYTA==[/tex]正方向传播.在距离波源 [tex=0.571x1.0]QDHYLzpRIwhOrWBqGonCgg==[/tex] 处有一平面将波反 射 (反射时无半波损失), 如图[tex=1.786x1.0]v7XcjmxgzbXrYiknCRjjgA==[/tex],则反射波的表 达式为 ( )[img=249x192]17ac8eb0db36f6c.png[/img] 未知类型：{'options': ['[tex=9.643x2.214]JtU4/H/aJeg4SGbNUl9RcGJye9LTvrY/WsdO/R+MrDCPMFuDeH4Or9a32itMiajS8hD5p51O+flJZvkwZXGTig==[/tex]', '[tex=11.643x2.786]JtU4/H/aJeg4SGbNUl9RcJ7FiKFo7SVxHJ7XEWeBYsWAeU/gnIUuegzEtXEE4LF9eRzpn1F+cSLG8stXzHvjVQ==[/tex]', '[tex=11.643x2.786]JtU4/H/aJeg4SGbNUl9RcGJye9LTvrY/WsdO/R+MrDCEYmg4WiA1oSYuNpJQhvztyqIIout20lDzVzjOi8mT8Q==[/tex]', '[tex=12.143x2.786]JtU4/H/aJeg4SGbNUl9RcJ7FiKFo7SVxHJ7XEWeBYsWkVfByBCAezeVKWyxvt1xsUQaXCZUvm39xRQaL3GOvZw==[/tex]', '[tex=11.643x2.786]JtU4/H/aJeg4SGbNUl9RcGJye9LTvrY/WsdO/R+MrDCEYmg4WiA1oSYuNpJQhvztyqIIout20lDzVzjOi8mT8Q==[/tex]'], 'type': 102}
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}
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)