证明：[tex=5.286x1.5]WS74gUb/4Ppm99z/vI5JzHPuV4aKC/UXbgoE6V2iYso=[/tex]，当且仅当[tex=4.5x1.357]tBZYcFY3CZI2ZZwP4Yrihw==[/tex]
举一反三
- 证明: [tex=5.286x1.5]WS74gUb/4Ppm99z/vI5JzNJ47jP2C+hbwVvynnfRTQw=[/tex] 的充要条件是 [tex=4.5x1.357]U6R4KZ/ZA1xG3kNTBBaoT+FoCalf1qdbw+cLi+CQZSk=[/tex].
- 证明：[tex=5.429x1.5]+Lv/8ySxp3wsmNnr68haBlzIJuiXDiGcYx3cYlzyd/w=[/tex]，当且仅当[tex=4.5x1.357]w6i1ioP71q3T+d1GFTtU7w==[/tex].
- 求函数[tex=3.286x1.429]kdT+eIE7CHPynuN6CaN40g==[/tex]（抛物线）隐函数的导数[tex=1.071x1.429]BUw1BPFU3fsJlAl/vt9M9w==[/tex]当x=2与y=4及当x=2与y=0时,[tex=0.786x1.357]Hq6bf3CacUy07X+VImUMaA==[/tex]等于什么?
- 设 [tex=5.571x1.214]eJy7VhH65VRts6bfN/wW0qSLr6tx3UnjbIVZOYmgwsesZVe3LfON1m5XC/ZWRrMkgjy0XGvwUDiz8worWVhiiA==[/tex] 且 [tex=6.0x1.429]VfJMl/JRDhUg4N/j0auYnx91sJmE1DpqMHmFSN4UNcv1AaUPUDKP71ackj4WfGz6cmsXyPO/7LbhB5qW3HMOIQ==[/tex] 证明1) [tex=5.0x1.357]PF4+0fQrOtrBMOGLTbiojWHD9HeQmUzzlH8ydOx6ZwA=[/tex] 当且仅当 [tex=6.714x1.214]t4fgzvN247twKwYp+jekqaSM2F1I59tfyLmarSTXF4jE9lVv1R3jnvrDqwnb09fgUQmV/i9jvGb1VP+NNe+qqJa017u08tzfXp2iJTfc89g=[/tex]2) [tex=5.429x1.0]bm3Mth7dIBkvW5h/YcCTdo75g2LQal/3MslYLuzIX7ljVLOMmokJVQ3pqIFz3ScpDLxYC3YRlx9OGboSSdFkPA==[/tex] 当且仅当 [tex=6.429x1.214]t4fgzvN247twKwYp+jekqd5tQX6Ir1tVtuMZ4EYdcuM175TWc9SLTF5enyW9KACLFLU5unY24y0o6hpa7IDat+mjWrcIYnd8nNNZzeFfjL8=[/tex].
- 证明 [tex=4.714x1.143]2D9plpuZLil62r5RSp12pw==[/tex] 当且仅当[tex=3.071x1.214]Kl+mn1OI6PICS3KqOJAQfg==[/tex]