小强:能求出X²+6X-5的最小值吗?如果能,其最小值是多少?小超:能,因为X²+6X-5=X²+6X+9-9-5=(X²+6X+9)-14=(X+3)²-14,而(X+3)²大于或等于0,所以X²+6X-5的最小值是-142.你能求出X²
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/08 14:44:03
![小强:能求出X²+6X-5的最小值吗?如果能,其最小值是多少?小超:能,因为X²+6X-5=X²+6X+9-9-5=(X²+6X+9)-14=(X+3)²-14,而(X+3)²大于或等于0,所以X²+6X-5的最小值是-142.你能求出X²](/uploads/image/z/15201069-69-9.jpg?t=%E5%B0%8F%E5%BC%BA%EF%BC%9A%E8%83%BD%E6%B1%82%E5%87%BAX%26%23178%3B%2B6X-5%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC%E5%90%97%3F%E5%A6%82%E6%9E%9C%E8%83%BD%2C%E5%85%B6%E6%9C%80%E5%B0%8F%E5%80%BC%E6%98%AF%E5%A4%9A%E5%B0%91%3F%E5%B0%8F%E8%B6%85%EF%BC%9A%E8%83%BD%2C%E5%9B%A0%E4%B8%BAX%26%23178%3B%2B6X-5%3DX%26%23178%3B%2B6X%2B9-9-5%3D%EF%BC%88X%26%23178%3B%2B6X%2B9%29-14%3D%28X%2B3%29%26%23178%3B-14%2C%E8%80%8C%28X%2B3%29%26%23178%3B%E5%A4%A7%E4%BA%8E%E6%88%96%E7%AD%89%E4%BA%8E0%2C%E6%89%80%E4%BB%A5X%26%23178%3B%2B6X-5%E7%9A%84%E6%9C%80%E5%B0%8F%E5%80%BC%E6%98%AF-142.%E4%BD%A0%E8%83%BD%E6%B1%82%E5%87%BAX%26%23178%3B)
xUNA~&fYD)kpe4ZzPT,EڂJ!*B,.3,WB ]4m/{~̌-2R[}5tp-'g7/t8'IEKkAVgyU1@'yM<"`}3q3 C:/iw8qܭ$c.N*JSGgq&䟨Q/&]An`wy5=fY>eg߬ ~à}"1 b&Д