求表面积为 [tex=0.929x1.214]cCzS/cTqVNRb3hzF7/9UBw==[/tex] 而体积为最大的长方体的体积.

证明: [tex=0.571x0.786]HXNXn3AXpwdIpZt8+6oCEw==[/tex] 是域 [tex=0.786x1.286]BlkXDnmzWHxe4M6E9LlofQ==[/tex] 上的代数元当且仅当 [tex=0.929x1.214]cCzS/cTqVNRb3hzF7/9UBw==[/tex] 是 [tex=0.786x1.286]BlkXDnmzWHxe4M6E9LlofQ==[/tex] 上的代数元. 

总体分布正态，总体方差[tex=0.929x1.214]cCzS/cTqVNRb3hzF7/9UBw==[/tex]未知时，从总体中随机抽取容量为25的小样本，用样本平均数估计总体平均数的置信区间为( )。 未知类型：{'options': ['[tex=15.5x2.429]CfKfni7Og+l9H33unWjOg/W7EsVlXL+/UdQmmOCOhUL/iL8a8zLl1yVQwvSH7NrgHLAg9mZcUU9ValqYlZyK59k/y0uiDtjGAP6vut1JZYUNuQZiRTputOus4p+af5El2nnW51sE0DNkVqQJzr5Ys45JMoF/syOOn8hq0rCVsCw=[/tex]', '[tex=16.357x2.429]gmYNopPQf//B5C/LUiNhixkp7aI/mOXaGTLUgsr3/qZQM+ExCJuJQnwgfO4+exW5ep8U3z47abv3Xn63U4TQjJTo7Axp1YrViqVhQryJhnZAY7cQ8LJm8qdmHDRayhHlabyixnlZw6Fox1lcViU6u9ZsESjbMRaXC3+2H+rfpt0=[/tex]', '[tex=18.429x2.429]2+pCUIExc0GQVU7c4jNZ2hqI7NIxleXjsrz/fBbgCCtN8Wc0ZIKdZpY4jnfvoRh58eq7RajEWQQmGGYXBYD1hF1oUfPURSO7EHJ1/Y5s/qDHar0lJ3kyIvZ7B5bbTH2Qd1Gomn5Gst07sfaG7jKOTEWpRblaZujHOMANV37qRrg=[/tex]', '[tex=18.071x2.429]VPW/4IeKeI99DQcQ0Td0tcpjJE6szlcpdi5bdT4XjHpakRBawU3tVfFFsXUG8YvM1EP9L/rF4nZX1VqqhvnZFyHox0Txvr/ykx+oj0jiWP7p3EweoZ7lvskwMPs6bsO6LD4LynTfD7JPZyPjR0m8EEeuPBo1MMED7ynCuVScJU0=[/tex]'], 'type': 102}

总体分布正态，总体方差[tex=0.929x1.214]cCzS/cTqVNRb3hzF7/9UBw==[/tex]未知时，从总体中随机抽取容量为25的小样本，用样本平均数估计总体平均数的置信区间为( )。 未知类型：{'options': ['[tex=15.5x2.429]CfKfni7Og+l9H33unWjOg/W7EsVlXL+/UdQmmOCOhUL/iL8a8zLl1yVQwvSH7NrgHLAg9mZcUU9ValqYlZyK59k/y0uiDtjGAP6vut1JZYUNuQZiRTputOus4p+af5El2nnW51sE0DNkVqQJzr5Ys45JMoF/syOOn8hq0rCVsCw=[/tex]', '[tex=16.357x2.429]gmYNopPQf//B5C/LUiNhixkp7aI/mOXaGTLUgsr3/qZQM+ExCJuJQnwgfO4+exW5ep8U3z47abv3Xn63U4TQjJTo7Axp1YrViqVhQryJhnZAY7cQ8LJm8qdmHDRayhHlabyixnlZw6Fox1lcViU6u9ZsESjbMRaXC3+2H+rfpt0=[/tex]', '[tex=18.429x2.429]2+pCUIExc0GQVU7c4jNZ2hqI7NIxleXjsrz/fBbgCCtN8Wc0ZIKdZpY4jnfvoRh58eq7RajEWQQmGGYXBYD1hF1oUfPURSO7EHJ1/Y5s/qDHar0lJ3kyIvZ7B5bbTH2Qd1Gomn5Gst07sfaG7jKOTEWpRblaZujHOMANV37qRrg=[/tex]', '[tex=18.071x2.429]VPW/4IeKeI99DQcQ0Td0tcpjJE6szlcpdi5bdT4XjHpakRBawU3tVfFFsXUG8YvM1EP9L/rF4nZX1VqqhvnZFyHox0Txvr/ykx+oj0jiWP7p3EweoZ7lvskwMPs6bsO6LD4LynTfD7JPZyPjR0m8EEeuPBo1MMED7ynCuVScJU0=[/tex]'], 'type': 102}

总体分布正态，总体方差[tex=0.929x1.214]cCzS/cTqVNRb3hzF7/9UBw==[/tex]未知时，从总体中随机抽取容量为25的小样本，用样本平均数估计总体平均数的置信区间为( )。 未知类型：{'options': ['[tex=15.5x2.429]CfKfni7Og+l9H33unWjOg/W7EsVlXL+/UdQmmOCOhUL/iL8a8zLl1yVQwvSH7NrgHLAg9mZcUU9ValqYlZyK59k/y0uiDtjGAP6vut1JZYUNuQZiRTputOus4p+af5El2nnW51sE0DNkVqQJzr5Ys45JMoF/syOOn8hq0rCVsCw=[/tex]', '[tex=16.357x2.429]gmYNopPQf//B5C/LUiNhixkp7aI/mOXaGTLUgsr3/qZQM+ExCJuJQnwgfO4+exW5ep8U3z47abv3Xn63U4TQjJTo7Axp1YrViqVhQryJhnZAY7cQ8LJm8qdmHDRayhHlabyixnlZw6Fox1lcViU6u9ZsESjbMRaXC3+2H+rfpt0=[/tex]', '[tex=18.429x2.429]2+pCUIExc0GQVU7c4jNZ2hqI7NIxleXjsrz/fBbgCCtN8Wc0ZIKdZpY4jnfvoRh58eq7RajEWQQmGGYXBYD1hF1oUfPURSO7EHJ1/Y5s/qDHar0lJ3kyIvZ7B5bbTH2Qd1Gomn5Gst07sfaG7jKOTEWpRblaZujHOMANV37qRrg=[/tex]', '[tex=18.071x2.429]VPW/4IeKeI99DQcQ0Td0tcpjJE6szlcpdi5bdT4XjHpakRBawU3tVfFFsXUG8YvM1EP9L/rF4nZX1VqqhvnZFyHox0Txvr/ykx+oj0jiWP7p3EweoZ7lvskwMPs6bsO6LD4LynTfD7JPZyPjR0m8EEeuPBo1MMED7ynCuVScJU0=[/tex]'], 'type': 102}

总体分布正态，总体方差[tex=0.929x1.214]cCzS/cTqVNRb3hzF7/9UBw==[/tex]未知时，从总体中随机抽取容量为25的小样本，用样本平均数估计总体平均数的置信区间为( )。 未知类型：{'options': ['[tex=15.5x2.429]CfKfni7Og+l9H33unWjOg/W7EsVlXL+/UdQmmOCOhUL/iL8a8zLl1yVQwvSH7NrgHLAg9mZcUU9ValqYlZyK59k/y0uiDtjGAP6vut1JZYUNuQZiRTputOus4p+af5El2nnW51sE0DNkVqQJzr5Ys45JMoF/syOOn8hq0rCVsCw=[/tex]', '[tex=16.357x2.429]gmYNopPQf//B5C/LUiNhixkp7aI/mOXaGTLUgsr3/qZQM+ExCJuJQnwgfO4+exW5ep8U3z47abv3Xn63U4TQjJTo7Axp1YrViqVhQryJhnZAY7cQ8LJm8qdmHDRayhHlabyixnlZw6Fox1lcViU6u9ZsESjbMRaXC3+2H+rfpt0=[/tex]', '[tex=18.429x2.429]2+pCUIExc0GQVU7c4jNZ2hqI7NIxleXjsrz/fBbgCCtN8Wc0ZIKdZpY4jnfvoRh58eq7RajEWQQmGGYXBYD1hF1oUfPURSO7EHJ1/Y5s/qDHar0lJ3kyIvZ7B5bbTH2Qd1Gomn5Gst07sfaG7jKOTEWpRblaZujHOMANV37qRrg=[/tex]', '[tex=18.071x2.429]VPW/4IeKeI99DQcQ0Td0tcpjJE6szlcpdi5bdT4XjHpakRBawU3tVfFFsXUG8YvM1EP9L/rF4nZX1VqqhvnZFyHox0Txvr/ykx+oj0jiWP7p3EweoZ7lvskwMPs6bsO6LD4LynTfD7JPZyPjR0m8EEeuPBo1MMED7ynCuVScJU0=[/tex]'], 'type': 102}