求 AP 1/3, (1-3b)/3, (1-6b)/3, ... 的共同点
算术被称为数论中最基本的部分,它处理数字及其相关的计算。诸如加法、减法、乘法、除法之类的运算称为算术运算。这些是日常生活中常用的+、-、*、/。加法用于求和。用'+'表示,减法用于求差。用'-'表示,乘法用于求积。用“×”表示,除法用于求商,用“÷”表示。
序列和系列
允许任何类型的重复的有组织的组件集合称为序列。系列是所有元素的总和。序列基本上是任何序列的所有项的总和。
算术级数
等差数列或数列是数字的序列/序列,使得连续项之间的共同差保持不变,即每个项与前一项(如果存在)相差一个恒定值。共同差异表示为“d”。如果序列是 a 1 , a 2 , a 3 , a 4 , a 5 ,... a n 。共同点变成了,
d= a 2 – a 1 = a 3 – a 2 = a 4 – a 3 = a n – a n-1
计算 AP 1/3、(1-3b)/3、(1-6b)/3 的公差。
Given that the three terms are in AP.
The given terms of AP :
Now to get common differences, subtract the 1st term from the 2nd term.
= -b
Hence the common difference is -b.
类似问题
问题 1:计算 AP ⇢ 2/9, (1-3b)/9, (1-6b)/9 的公差。
解决方案:
Given that the three terms are in AP.
The given terms of AP :
Now to get common differences, subtract the 1st term from the 2nd term.
Hence the common difference is .
问题 2:如果 1, 6, 11, 16, 21... 是一个算术数列,求共同差。
解决方案:
Given the elements are in AP.
Now to get common differences, subtract the 1st term from the 2nd term.
common difference = 6-1 = 5.
Hence the common difference is 5.
问题3:如果1、6、11、16、21……是一个算术数列,求第100项
解决方案:
The nth term of an AP is given by : Tn = a + (n-1)d,
where,
a is the first term
here a =1
d is the common difference.
here d= 6-1=5.
Tn = 1 + (100 – 1)5 = 496.
Hence the 100th term is 496.
问题 4:在 AP 中,第 12 项是 36。如果第 1 项是 3,求 AP 的共同点。
解决方案:
The nth term of an AP is given by: Tn = a + (n-1)d,
where:
a is the first term
here a =3
n is the term
here n = 12
Tn= nth term
here Tn =36
d is the common difference.
Applying Tn = a + (n-1)d
36 = 3 + (12– 1)d
d=3.
Hence the common difference is 3.