该数学或科学计算器使用 [DEG]意思是度模式。 这于三角计算使用。 例如：COS (90)意思是 cos (90) 意思是 g相同.。. 模式是全世界学生通常使用。 使用科学计算器执行三角计算时需要小心。 有些计算器使用 [RAD]弧度模式或者Radian (1 RAD = 57,296°)作为标准设定。 [RAD]（弧度）模式，通常用于高等教育，例如: 纯物理学。 按 [RAD]改变 [Radian] 弧度模式。 A1。 基本按键功能. F2 按键访问权限：反三角sin -1 （arcsin），反餘弦 cos -1 （arccos），反正切 tan -1 …

2021年6月26日 · 分析：根据乘法的性质及数位知识可知，7＞6＞5＞4＞3，所以用7、6、5、4、3组成一个三位数乘两位数，要使乘积最大应该是：

根据乘法的性质及数位知识可知，7＞6＞5＞4＞3，所以用7、6、5、4、3组成一个三位数乘两位数，要使乘积最大应该是：653×74=48322；要想使乘积最小应该是：467×35=16345．答：要使乘积最大应该是653和74两个数，要...

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2013年7月15日 · 数字推理3,3,4,5,7,7,11,9, ( )奇数和偶数各自形成一个数列分别是3，4,7,11前两个数之和等于第三个数3,5,7,9相临两个数差为2所以括号里是18和11奇数项 6,5,4，所以是3偶数项 7,8,9，所以是10

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Find the common difference by subtracting any term in the sequence from the term that comes after it. The difference of the sequence is constant and equals the difference between two consecutive terms. 2. Find the sum. Calculate the sum of the sequence using the sum formula: S u m = (n (a 1 + a n)) / 2. Plug in the terms. Simplify the expression.

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