
9 7 8 6 7 5 ( ) 括号里的数是几? 我要理由 - 百度知道
1、标出序列号:找规律的题目,通常按照一定的顺序给出一系列量,要求我们根据这些已知的量找出一般规律。 找出的规律,通常包序列号。 所以,把变量和序列号放在一起加以比较,就比较容易发现其中的奥秘。 2、斐波那契数列法:每个数都是前两个数的和. 3、 等差数列 法:每两个数之间的差都相等. 4、跳格子法:可以间隔着看,看隔着的数之间有什么关系,如14,1,12,3,10,5,第奇数项成等差数列,第偶数项也成等差数列,于是接下来应该填8 …
9 7 8 6 7 5 ( ),请写出“ ( ) ”处的数字 - 百度知道
9 7 8 6 7 5 ___" ,填6,是两个序列,分别是98765和76543交叉. 9 7 8 6 7 5 ( ),请写出“ ( ) ”处的数字6。 计算经过如下:1、认真观察该数列:9、7 、8 、6 、7 、5 ;2、该数列奇数项:9、8、7;3、该数列偶数项:7、6、5;4、发现规律:该组数列无论是奇数项还是偶数项,
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找规律1、7、9、6、8、5、 ( )、13? - 知乎
2021年1月24日 · 我感觉是7,题中给了8个数,这八个数记为a1、a2...、a8,则有,a(n) + a(9-n) = 14,n=1,2,3,4,比如a1+a8=14,a2+a7=14,a2=7,则a7=7。
戒指号码5、6、7、8、9、10到底是多大? - 百度知道
3、一般戒指戴于食指、中指或无名指上,大部分女生佩带的戒指号数为9-15号,其中12号、13号的较多(当然,身材较瘦者除外);大部分男生佩带的戒指号数为17-22号,其中18-20号的较多。
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