摘要: ![image](https://img2024.cnblogs.com/blog/3270460/202401/3270460-20240124090003604-1739964152.png) ![image](https://img2024.cnblogs.com/blog/3270460/202401/3270460-20240124090006906-228653418.png) ![i 阅读全文
posted @ 2024-01-24 09:00 会飞的鱼13 阅读(18) 评论(0) 推荐(0)
摘要: 简单的找点问题 已知函数\(f(x)=ax^3+2\sin x-x\cos x\) \((1)\) 若\(a=-\dfrac{1}{2},x\in\left(0,\dfrac{\pi}{2}\right)\),证明:\(f(x)\geq 0\) \((2)\)探究\(f(x)\)在\((-\pi,\ 阅读全文
posted @ 2024-01-24 08:01 会飞的鱼13 阅读(28) 评论(0) 推荐(0)