【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...
【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
【简答题】什么是问题和数学问题?一个好的数学问题应具有哪些特点?数学问题的分类有哪些?
【单选题】What was their son Benjamin found of doing during their stay at the hotel?
A.
Playing with Chinese staff at the hotel.
B.
Eating the local food.
C.
Trying to place the key into the slot of the key box.
D.
Playing with the author's colleaguses.
【单选题】They wondered what was ____ their son.
【单选题】It was the pliceman came the parents knew what had happened to their son.