行測數(shù)量關(guān)系常用公式匯總

1、第1頁共12頁公務員考試公務員考試行測數(shù)學常用公式匯總大全行測數(shù)學常用公式匯總大全（行測數(shù)學秒殺實戰(zhàn)方法）（行測數(shù)學秒殺實戰(zhàn)方法）目錄目錄一、基礎代數(shù)公式一、基礎代數(shù)公式....................................................................................................................................2二、

2、等差數(shù)列二、等差數(shù)列............................................................................................................................................2三、等比數(shù)列三、等比數(shù)列.........................................................

3、...................................................................................2四、不等式四、不等式..............................................................................................................................

4、..................3五、基礎幾何公式五、基礎幾何公式....................................................................................................................................3六、工程問題六、工程問題........................................

5、....................................................................................................4七、幾何邊端問題七、幾何邊端問題.......................................................................................................

6、.............................4八、利潤問題八、利潤問題............................................................................................................................................5九、排列組合九、排列組合.........................

7、...................................................................................................................5十、年齡問題十、年齡問題............................................................................................

8、................................................5十一、植樹問題十一、植樹問題........................................................................................................................................6十二、行程問題十二、行程問題......

9、..................................................................................................................................6十三、鐘表問題十三、鐘表問題...........................................................................

10、.............................................................7十四、容斥原理十四、容斥原理........................................................................................................................................7十五、牛吃草問

11、題十五、牛吃草問題....................................................................................................................................8十六、棄九推斷十六、棄九推斷................................................................

12、........................................................................8十七、乘方尾數(shù)十七、乘方尾數(shù).....................................................................................................................................

13、...8十八、除以十八、除以“7”“7”乘方余數(shù)核心口訣乘方余數(shù)核心口訣......................................................................................................8十九、指數(shù)增長十九、指數(shù)增長...................................................................

14、.....................................................................9二十、溶液問題二十、溶液問題........................................................................................................................................

15、9二十二、減半調(diào)和平均數(shù)二十二、減半調(diào)和平均數(shù)......................................................................................................................1010二十三、余數(shù)同余問題二十三、余數(shù)同余問題.......................................................

16、...................................................................1010二十四、星期日期問題二十四、星期日期問題..........................................................................................................................1010二十五

17、、循環(huán)周期問題二十五、循環(huán)周期問題..........................................................................................................................1010二十六、典型數(shù)列前二十六、典型數(shù)列前N項和項和......................................................

18、............................................................1111第3頁共12頁（其中：n為項數(shù)，a1為首項，an為末項，q為公比，sn為等比數(shù)列前n項的和）四、不等式四、不等式（1）一元二次方程求根公式一元二次方程求根公式：ax2bxc=a(xx1)(xx2)其中：x1=；x2=（b24ac0）aacbb242???aacbb242????根與系數(shù)的關(guān)系：x1x2=，x1x

19、2=abac（2）abba2??abba??2)2(abba222??abccba???3)3(（3）abccba3222???abccba33???推廣：nnnxxxnxxxx......21321?????（4）一階導為零法：連續(xù)可導函數(shù)，在其內(nèi)部取得最大值或最小值時，其導數(shù)為零。（5）兩項分母列項公式：=(—))(ammb?m1am?1ab三項分母裂項公式：=[—])2)((amammb??)(1amm?)2)((1amam??a