还有分式不等式的题,思路也行)1){(3a^2+2a+2)/(a^2+a+1)}>k恒成立,求k的取值范围2)解a的不等式(a^2-(k+2)a+2k)/a>0 (k是实数)
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![还有分式不等式的题,思路也行)1){(3a^2+2a+2)/(a^2+a+1)}>k恒成立,求k的取值范围2)解a的不等式(a^2-(k+2)a+2k)/a>0 (k是实数)](/uploads/image/z/13442440-40-0.jpg?t=%E8%BF%98%E6%9C%89%E5%88%86%E5%BC%8F%E4%B8%8D%E7%AD%89%E5%BC%8F%E7%9A%84%E9%A2%98%2C%E6%80%9D%E8%B7%AF%E4%B9%9F%E8%A1%8C%EF%BC%891%EF%BC%89%7B%EF%BC%883a%5E2%2B2a%2B2%29%2F%EF%BC%88a%5E2%2Ba%2B1%EF%BC%89%7D%3Ek%E6%81%92%E6%88%90%E7%AB%8B%2C%E6%B1%82k%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B42%29%E8%A7%A3a%E7%9A%84%E4%B8%8D%E7%AD%89%E5%BC%8F%28a%5E2-%28k%2B2%29a%2B2k%29%2Fa%3E0+%28k%E6%98%AF%E5%AE%9E%E6%95%B0%EF%BC%89)
还有分式不等式的题,思路也行)1){(3a^2+2a+2)/(a^2+a+1)}>k恒成立,求k的取值范围2)解a的不等式(a^2-(k+2)a+2k)/a>0 (k是实数)
还有分式不等式的题,思路也行)
1){(3a^2+2a+2)/(a^2+a+1)}>k恒成立,求k的取值范围
2)解a的不等式(a^2-(k+2)a+2k)/a>0 (k是实数)
还有分式不等式的题,思路也行)1){(3a^2+2a+2)/(a^2+a+1)}>k恒成立,求k的取值范围2)解a的不等式(a^2-(k+2)a+2k)/a>0 (k是实数)
1){(3a^2+2a+2)/(a^2+a+1)}>k恒成立
3a^2+2a+2>k(a^2+a+1)
(3-k)a^2+(2-k)a+(2-k)>0
△=(2-k)^2-4(3-k)(2-k)=(2-k)(3k-10)≥0
2≤k≤10/3
2)
(a^2-(k+2)a+2k)/a>0
(a-2)(a-k)/a>0
k≥2时,a>k,或,0