聚苯乙烯的抗冲击性能如何?为什么? [tex=3.929x1.286]p0cRTikrys4oFbXLYmy6cA==[/tex]
举一反三
- 设函数[tex=9.143x1.286]LV3nV/l1vMN2HPktPBkRmVRVVxMaKzPkJPp4qxKTM1s=[/tex][tex=5.929x1.286]G5ey8ZlYD+wo8Jl39ZWJNw==[/tex]说明[tex=3.929x1.286]nOJBJucVwlQuHq02hM9TshFm+YZTv5ximTg1KFYKyjI=[/tex]有几个实根,为什么?这些实根分别在什么区间?
- 设 [tex=3.357x1.286]B4EvuocBo6bNmntvVOKr4Q==[/tex], 则 [tex=3.929x1.286]WDPfwGv5K4obHhD+QzJrkAizgPIo75M71pYsvV99WjE=[/tex][input=type:blank,size:6][/input].
- 设[tex=0.857x1.286]RFrkvDyvKeTvv0Y+OA8C+g==[/tex]为[tex=2.643x1.286]yu9Fqc429BTsCWKDfgGy8g==[/tex]矩阵,[tex=0.786x1.286]HWURx4IKz9KeoQH1jp6DLQ==[/tex]为[tex=2.643x1.286]6/RzClznJ0ApNmeA+nDTlA==[/tex]矩阵,[tex=0.786x1.286]3v6qW1kOX67rLWteAhaBrQ==[/tex]为[tex=0.857x1.286]VtHyCG+ZQg7fAIyRU+W9ow==[/tex]阶单位矩阵,若[tex=3.714x1.286]Bki3BOAz+QT9YJQnEyH/dnzOhkmI07ZjW11dqEuhp+o=[/tex],则( )。 未知类型:{'options': ['[tex=4.214x1.286]fzez9mehVjU7B49/3BSlwlAyLcdcXlP7qjXa0tgJ1yA=[/tex],[tex=4.214x1.286]ZigaOerRNU+LvUzHS0KaO4x9grXJG+qUz7IwiS5DP4c=[/tex]', '[tex=4.214x1.286]fzez9mehVjU7B49/3BSlwlAyLcdcXlP7qjXa0tgJ1yA=[/tex],[tex=3.929x1.286]ZigaOerRNU+LvUzHS0KaO/WiPhBwDBbkm9iT1JDDrpU=[/tex]', '[tex=3.929x1.286]fzez9mehVjU7B49/3BSlwqHXH51nhYA9ZFZ/8tFS9J4=[/tex],[tex=4.214x1.286]ZigaOerRNU+LvUzHS0KaO4x9grXJG+qUz7IwiS5DP4c=[/tex]', '[tex=3.929x1.286]fzez9mehVjU7B49/3BSlwqHXH51nhYA9ZFZ/8tFS9J4=[/tex],[tex=3.929x1.286]ZigaOerRNU+LvUzHS0KaO/WiPhBwDBbkm9iT1JDDrpU=[/tex]'], 'type': 102}
- [tex=3.929x1.286]+B6lDsDknLabW4CpReaM2Q==[/tex]
- 设有下列4个条件:(1)[tex=1.857x1.286]G6WxJ307HB2e1l7Qz3uNbQ==[/tex]在[tex=1.929x1.286]vPlUmwL8t1REs9r1XOy2kg==[/tex]上连续.(2)[tex=1.857x1.286]G6WxJ307HB2e1l7Qz3uNbQ==[/tex]在[tex=1.929x1.286]vPlUmwL8t1REs9r1XOy2kg==[/tex]上有界.(3)[tex=1.857x1.286]G6WxJ307HB2e1l7Qz3uNbQ==[/tex]在[tex=1.929x1.286]vPlUmwL8t1REs9r1XOy2kg==[/tex]上可导. (4)[tex=1.857x1.286]G6WxJ307HB2e1l7Qz3uNbQ==[/tex]在[tex=1.929x1.286]vPlUmwL8t1REs9r1XOy2kg==[/tex]上可积. 则这4个条件之间的正确关系是 未知类型:{'options': ['[tex=5.214x1.286]otUBslvC+g9E/+QRN3FPcz3QWAnX57gbwSFiq/83tZrJDCQDXng89PvbVLa0ErH1[/tex][tex=3.929x1.286]tD4aFAoM85LoQt+qBgIMMo1Mlcypda8ZwrSysyWdmUM=[/tex]', '[tex=5.214x1.286]otUBslvC+g9E/+QRN3FPc+FFFKMJscOGEYnfyfqpT38HisBD+YsE9Wm8vKAwGBZU[/tex][tex=3.929x1.286]i1AFd+ysL/BK+chgAtWII4EOHwT9ui5FjdIGbZfMEVY=[/tex]', '[tex=5.214x1.286]otUBslvC+g9E/+QRN3FPc63PLXQBY+RInk3VeIGVKAUTVTu9w4rFocSKUD2aYvIJ[/tex][tex=3.929x1.286]tD4aFAoM85LoQt+qBgIMMg94hhXOci2B7g9Vu4mm3UA=[/tex]', '[tex=5.214x1.286]4/5aoaEuruE0zuHBY80AilsCo+Vn8cII8nbhXUGzLxvxZe8HtwdnL7T48PRQeC9D[/tex][tex=3.929x1.286]i1AFd+ysL/BK+chgAtWII4EOHwT9ui5FjdIGbZfMEVY=[/tex]'], 'type': 102}