số các số có 5 chữ số là : (99999 - 10000)+1=90000 số
tick cho tôi tròn 50 cái
99999 - 10000 + 1 = 90000
Nhớ tick cho mình nhé !
co the viet duoc bao nhieu so co nam chu so khac nhau tu 5 chu so 1,2,3,4,5
Cho day so tu nhien A duoc tao boi: 1010;1011;........;2014
-Co bao nhieu chu so 0
-Co bao nhieu chu so 1
-Co bao nhieu chu so 2
-Co bao nhieu chu so 5
1..Voi cac chu so 0;1;2;8.Hoi lap duoc bao nhieu so thap phan co du 4 chu so da cho ma co 2 chu so o phan nguyen
2..Voi cac chu so 2;8;1;5.Hoi lap duoc bao nhieu so thap phan co du 4 chu so da cho ma co 2 chu so o phan nguyen
3..Voi cac chu so 0;4;6;8.Hoi lap duoc bao nhieu so thap phan co du 4 chu so da cho ma co 3 chu so o phan thap phan
4..Voi cac chu so 0;2;4;6.Hoi lap duoc bao nhieu so thap phan co du 4 chu so da cho ma co 2 chu so o phan thap phan
Cho 4 chu so 0 ; 1 ; 2 ; 3 . Hoi tu 4 chu so da cho :
a) Viet duoc tat ca bao nhieu so co 3 chu so khac nhau tu 4 chu so da cho ?
b) Co the viet duoc bao nhieu so co 3 chu so ?
c) Co the viet duoc bao nhieu so le co 3 chu so ma chu so hang chuc la 1 ?
d) Tim so lon nhat, so be nhat co 3 chu so khac nhau viet duoc tu 4 chu so da cho ?
A= 0.10*0.01 * 0.001* 0.0001* 0.00001 * ....*0.00.....01 co bao nhieu chu so 0 nam sau dau phay biet thua so cuoi cung co 20 chu so 0 o phan thap phan
co the viet duoc bao nhieu so thap phan co 3 chu so khac nhau tu cac chu so 1,2,3 trong cac so viet duoc co bao nhieu so co 1 chu so o phan thap phan
co bao nhieu chu so co 3 chu so ma trong cac chu so co chu so 5
Co bao nhieu so co 3 chu so co chu so 1
co bao nhieu so co 4 chu so ma cac chu so co 1 chu so 2
