将曲线的一般方程转化为参数方程:[tex=7.714x3.357]7EJHVCtO2IWq3KpdB+jQsv6FwiTm8kMJkqqPTKC4ZLC9MoWjjZJHpMUD0WvK14ggukXyFRLhHpApYmUGj6nhY3REMffMHUfHxoypNCvmJ90=[/tex]
将曲线的一般方程转化为参数方程:[tex=7.714x3.357]7EJHVCtO2IWq3KpdB+jQsv6FwiTm8kMJkqqPTKC4ZLC9MoWjjZJHpMUD0WvK14ggukXyFRLhHpApYmUGj6nhY3REMffMHUfHxoypNCvmJ90=[/tex]
求下列参数方程组的三阶导数:[tex=7.714x3.357]7EJHVCtO2IWq3KpdB+jQspoKicei4n6m0vhX9aBr4O51MX/Vxw5T6hJqjgZJ63A0DgWLrNWrhyStc9Gn5chr1cGFM9UFGfRnjtV/G2GFPLXi0Sc/kKwgb7VqF3UB9Ghv[/tex]
求下列参数方程组的三阶导数:[tex=7.714x3.357]7EJHVCtO2IWq3KpdB+jQspoKicei4n6m0vhX9aBr4O51MX/Vxw5T6hJqjgZJ63A0DgWLrNWrhyStc9Gn5chr1cGFM9UFGfRnjtV/G2GFPLXi0Sc/kKwgb7VqF3UB9Ghv[/tex]
解以下二阶常系数线性微分方程. [tex=7.714x3.357]fnpmC2J6JmQBLyo5NmGAz5wWEyurfSmlAelYh3EtccmzsCm8aL3SGzW+6AyVyvrkyvE61oIKVG9ybIh+iob/7YJ4rDLzm6CU+uwTcAKfMJDb+1CMha817DecC/WCmyx+yRyk6UKOOLw0W9jHsMO2MQ==[/tex][br][/br]
解以下二阶常系数线性微分方程. [tex=7.714x3.357]fnpmC2J6JmQBLyo5NmGAz5wWEyurfSmlAelYh3EtccmzsCm8aL3SGzW+6AyVyvrkyvE61oIKVG9ybIh+iob/7YJ4rDLzm6CU+uwTcAKfMJDb+1CMha817DecC/WCmyx+yRyk6UKOOLw0W9jHsMO2MQ==[/tex][br][/br]
求由参数方程[tex=7.714x3.357]7EJHVCtO2IWq3KpdB+jQshKQOxbCXQe3UJWRVZc7cnvwN3bPEPzFh9Oxm0Dmp7jGR32cKVbAdEmQt9cWb44QRY/nZuN41wVijXP3c6vWiLg=[/tex][tex=4.143x1.286]csoNUXq0gq5VIDPXGdJggfGAJiN+m0Od95+z+plKX4Y=[/tex] 所确定函数的二阶导数[tex=1.786x2.5]+sfv9fbaljqgKDIK5JrU9Y5Em4Qd79k9c+OoGz0cVHA=[/tex].
求由参数方程[tex=7.714x3.357]7EJHVCtO2IWq3KpdB+jQshKQOxbCXQe3UJWRVZc7cnvwN3bPEPzFh9Oxm0Dmp7jGR32cKVbAdEmQt9cWb44QRY/nZuN41wVijXP3c6vWiLg=[/tex][tex=4.143x1.286]csoNUXq0gq5VIDPXGdJggfGAJiN+m0Od95+z+plKX4Y=[/tex] 所确定函数的二阶导数[tex=1.786x2.5]+sfv9fbaljqgKDIK5JrU9Y5Em4Qd79k9c+OoGz0cVHA=[/tex].
求[tex=7.714x3.357]fnpmC2J6JmQBLyo5NmGAz9K9Jv/Q2VPdKVxt22XqyXCQX8k6OilZ23nknYD/BWjsw8ClO5/VJ2IJuUP7i7+cMOIz8Tzjxzz2mtlCykZCw5E=[/tex]([tex=0.571x0.786]c59+3vo0/Vn/FvNRhDRu5g==[/tex]是常数)参数方程在[tex=3.071x2.143]pR+JI796wT8niVELM3CCkx4XYR+vn7Y2CMCdulAWdZM=[/tex]点的导数
求[tex=7.714x3.357]fnpmC2J6JmQBLyo5NmGAz9K9Jv/Q2VPdKVxt22XqyXCQX8k6OilZ23nknYD/BWjsw8ClO5/VJ2IJuUP7i7+cMOIz8Tzjxzz2mtlCykZCw5E=[/tex]([tex=0.571x0.786]c59+3vo0/Vn/FvNRhDRu5g==[/tex]是常数)参数方程在[tex=3.071x2.143]pR+JI796wT8niVELM3CCkx4XYR+vn7Y2CMCdulAWdZM=[/tex]点的导数
图示压杆体系中，弹簧支座刚度为[img=64x44]180379b3117202b.png[/img]，则该体系的临界荷载为kl的（ ）倍。[img=3924x1660]180379b32884d13.jpg[/img] A: 0.411 B: 1 C: 1.645 D: 3.357
图示压杆体系中，弹簧支座刚度为[img=64x44]180379b3117202b.png[/img]，则该体系的临界荷载为kl的（ ）倍。[img=3924x1660]180379b32884d13.jpg[/img] A: 0.411 B: 1 C: 1.645 D: 3.357
图示压杆体系中，弹簧支座刚度为[img=64x44]1802df48734317e.png[/img]，则该体系的临界荷载为kl的（ ）倍。[img=3924x1660]1802df4888c0309.jpg[/img] A: 0.411 B: 1 C: 1.645 D: 3.357
图示压杆体系中，弹簧支座刚度为[img=64x44]1802df48734317e.png[/img]，则该体系的临界荷载为kl的（ ）倍。[img=3924x1660]1802df4888c0309.jpg[/img] A: 0.411 B: 1 C: 1.645 D: 3.357
利用柱面坐标计算下列积分：[tex=7.714x3.357]lqxpp1Okm+2z/2drYPfTVLzwBpkFGo2mDWuL/Ga4jlt1Dvd3IUx8h8C5JqDlsQfuEdV6prhGAtegNiMkvBJHzdkDbKsHi2vE8ToiS6YCs1s=[/tex] 是由曲面 [tex=3.929x1.429]eXG42LBlVmCe9OBZMR2NwQ==[/tex]与 [tex=2.286x1.214]gBzqtDgEWxDF0TX+5reb9w==[/tex]所围成的闭区域.
利用柱面坐标计算下列积分：[tex=7.714x3.357]lqxpp1Okm+2z/2drYPfTVLzwBpkFGo2mDWuL/Ga4jlt1Dvd3IUx8h8C5JqDlsQfuEdV6prhGAtegNiMkvBJHzdkDbKsHi2vE8ToiS6YCs1s=[/tex] 是由曲面 [tex=3.929x1.429]eXG42LBlVmCe9OBZMR2NwQ==[/tex]与 [tex=2.286x1.214]gBzqtDgEWxDF0TX+5reb9w==[/tex]所围成的闭区域.
摆线 [tex=7.714x3.357]7EJHVCtO2IWq3KpdB+jQshKQOxbCXQe3UJWRVZc7cnvwN3bPEPzFh9Oxm0Dmp7jGR32cKVbAdEmQt9cWb44QRY/nZuN41wVijXP3c6vWiLg=[/tex] 的一拱 [tex=5.429x1.357]B+yQMUsxZMLaGYuFqfMMu+RuciKJQ8+Wub9vHNDnHMU=[/tex] 与 [tex=0.571x0.786]ZKO2xs0EgSemzoH7MSmYTA==[/tex] 轴之间的图形绕 [tex=0.5x1.0]yBR4oiFoTexGaFalQ7m8kg==[/tex] 轴旋转，求旋转体的体积
摆线 [tex=7.714x3.357]7EJHVCtO2IWq3KpdB+jQshKQOxbCXQe3UJWRVZc7cnvwN3bPEPzFh9Oxm0Dmp7jGR32cKVbAdEmQt9cWb44QRY/nZuN41wVijXP3c6vWiLg=[/tex] 的一拱 [tex=5.429x1.357]B+yQMUsxZMLaGYuFqfMMu+RuciKJQ8+Wub9vHNDnHMU=[/tex] 与 [tex=0.571x0.786]ZKO2xs0EgSemzoH7MSmYTA==[/tex] 轴之间的图形绕 [tex=0.5x1.0]yBR4oiFoTexGaFalQ7m8kg==[/tex] 轴旋转，求旋转体的体积
求下列曲线[tex=0.714x1.0]J/aA9EEo0KmJFnWWfX7LmQ==[/tex]绕给定坐标轴旋转一周得到的旋转曲面的方程:[tex=7.714x3.357]tS57oNKZfqoVB2b/pWUo0RqNsLiCWRlImMAF/mCDX2+kd1ihhg+0MBH8dM5F5lIwRO7BcRjvmsk7mI1OmQyNrDbwA8foFS7y771fGup8x98=[/tex][tex=4.214x1.214]7qgAui7Icry9Q1NpdZWWb8fZkBHxtt64U0Z1dkXFCTw=[/tex],[tex=0.5x1.0]iwXm0SwS+lfupyC0IyH8yQ==[/tex]zhou
求下列曲线[tex=0.714x1.0]J/aA9EEo0KmJFnWWfX7LmQ==[/tex]绕给定坐标轴旋转一周得到的旋转曲面的方程:[tex=7.714x3.357]tS57oNKZfqoVB2b/pWUo0RqNsLiCWRlImMAF/mCDX2+kd1ihhg+0MBH8dM5F5lIwRO7BcRjvmsk7mI1OmQyNrDbwA8foFS7y771fGup8x98=[/tex][tex=4.214x1.214]7qgAui7Icry9Q1NpdZWWb8fZkBHxtt64U0Z1dkXFCTw=[/tex],[tex=0.5x1.0]iwXm0SwS+lfupyC0IyH8yQ==[/tex]zhou