是一非线性方程组，可以动用求解非线性方程组的手段处理，不过这也是相当复杂的问题，何 况若 f x( ) 不可微，此路便行不通，故通常都采用使目标函数逐次下降的搜索方法

一只与区间长度有关,与区间的位置无关。即X落在两 个长度相等的区间内的概率相等。具有上述特点的随 机变量便是均匀分布的随机变量。 如:测量物体长度时读数的舍入误差服从均匀分 布。在(a,b)上随机掷质点

一、(1)在一个密度为p的流质表面下深h处的压强P=pgh(g是重力加速 度),试检验此公式的量纲是否正确? (2)在弹簧一质量一阻力系统中,质量为的物体在外力F(t)的作用下, 在t时刻的位置x(t)满足以下方程:

一、主要内容 1、五种标准类型的一阶微分方程的解法 (1)可分离变量的微分方程 形如g(y)dy=f(x)dx分离变量法

6.1 下表给出了美国1960-1995年36年间个人实际可支配收入X 和个人实际消费支出Y的数据

9.1 设真实模型为无截距模型： Y X u i i = + 2 2 回归分析中却要求截距项不能为零，于是，有人采用的实证分析回归模型为：

一、平面极坐标 设一质点在Oxy平面内运动,某时刻它位于点A.矢径与x轴之间的夹角为θ.于是质点在点A的位置可由A(r,)来确定以(r,0)为坐标的参考系为平面极坐标系

friends and enemies: I just can't believe everyone in here is a friend, and I don't want to leave anybody out. The question tonight, as I understand it, is \The Negro Revolt, and Where Do We Go From Here?\ or What Next?\ In my little humble way of understanding it, it points toward either the ballot or the bullet. Before we try and explain what is meant by the ballot or the bullet, I would like to clarify something concerning myself. I'm still a Muslim;

...And during the few moments that we have lef t, we want to have just an off-the-cuff chat between you and me -- us. We want to talk right down to earth in a language that everybody here can easily understand. We all agree tonight, all of the speakers have agreed, that America has a very serious problem. Not only does America have a very serious problem, but our people have a very serious problem

第一条 乙方将后记土地，为甲方设定地上权。 第二条 地上权设定目的是为了甲方所有的钢筋水泥建筑物。 第三条 地上权有效期限，自立约日起x年为限