【简答题】求出一个数学问题的正确结论后,将其作为条件之一,提出与原来问题有关的新问题,我们把它称为原来问题的一个“逆向”问题. 例如,原来问题是“若正四棱锥底面边长为4,侧棱长为3,求该正四棱锥的体积”.求出体积 16 3 后,它的一个“逆向”问题可以是“若正四棱锥底面边长为4,体积为 16 3 ,求侧棱长”;也可以是“若正四棱锥的体积为 16 3 ,求所有侧面面积之和的最小值”. 试给出问题“在平面直角坐...
【判断题】回归模型中,虚拟变量的引入数量,要根据定性变量的个数、每个定性变量的类型及有无截距项来确定。
【单选题】在数学问题中,将问题中的实际数学换为N或x,请问是数学思路中的哪一个步骤
【单选题】发现实际问题中的数学成分,并对这些成分做符号化处理,把一个实际问题转化为数学问题,这是( )的过程。
【单选题】There was a woman with normal vision whose father was color blind. She married a man with normal vision whose father was also color blind. What is the probability of their son affected by color blind?
【单选题】It was______ the policeman came______ the parents knew what had happened to their son.
【单选题】_______ made the parents proud was________ their son had been admitted to a key university.
【单选题】They wondered what was ____ their son.
【多选题】下列说法正确的是()。A.整数规划是线性规划的一个分支。B.整数规划是数学规划的一个分支。C.一部分整数规划问题是线性规划问题,另一部分是非线性规划问题。D.整数规划是运筹学的一个分支。
C.
.一部分整数规划问题是线性规划问题,另一部分是非线性规划问题。
【单选题】It was the pliceman came the parents knew what had happened to their son.