mỗi số cách nhau 3 đơn vị mình chỉ cần liệt kê ra thôi !!!!!!!!!!!!!!
- 11,14,17,20,23,26,29,32,35,38,41,44,47,50,53,56,59,62,65,68,.......
vậy số thứ 20 của dãy là 68 .đúng không vậy???
cho day 2,11,29,56,92,.. a) tim so hang thu 100 cua day b)so 407 la so hang thu may cua day
cho day 2,11,29,56,92,..
a) tim so hang thu 100 cua day
b)so 407 la so hang thu may cua day
cho day so 2;4;6;81012;......
a, hay tim chu so thu 100c day so tren
b, tim so hang thu 2021 cua day so
cho day so 2.4,4.6,6.8,.....
tim so hang thu 50 cua day
tinh tong cua 50 so hang dau tien
cho 3 , 24 , 63 , 120,195,....
a) tim quy luat cua day so tren
b)tim so hang thu 100
c)2048co pai la so hang cua day k
Cho day so 2*4;4*6;6*8;8*10;....
a,Tim so hang thu 50 cua day so tren
b, Tinh tong cua 50 so hang dau tien cua day so
Bai 5:a,Tim chu so thu 1000 khi viet lien tiep lien nhau cac so hang cua day chan 2,4,6,8,......
b,Tim chu so thu 1000 khi viet lien tiep lien nhau cac so hang cua day le 1,3,5,7,9,.....
cho day so :2,4,6,8 .....,2480
a. day so tren co bao nhieu so hang
b. tim so hang thu 2015 cua day
c.tinh tong 2015 so hang dau tien cua day
d.chu so thu 2015 cua day la chu so nao
Cho day so 2;5;10;17;....
a, Viet so hang tong quat cua day tren
b, Tim thu tu cua so 626 trong day so tren
