Cho bieu thuc A = 3/n-2

a) Tim cac so nguyen n de bieu thuc A la phan so

b) Tim cac so nguyen n de A la mot so nguyen

Cac giup minh nhe minh dang can gap.

tim cac phan so co tu so be hon 30 va: bang phan so 5/3 va bang phan so 4/7 dang cAN GAP

Tim 3 so nguyen to khac nhau a,b,c thoa man: a.b.c=3(a+b+c)

Giup mih nha minh dang can gap

tim mot phan so biet rang neu phan so do tru di 1/5 roi lai them 1/4 thi duoc 5/4. Phan so can tim la: .................................

Giup minh voi minh dang can gap

ai trl dc mik tick cho nha 

1¦ viet tap A cac so N n biet :

52/13 < n < hoac = 56/7

2¦ tim n thuoc N sao cho cac phan so co gt la so Z

a. n+6 : n

b n : n-3

3¦ tim 2 phan so co hieu bang 7 biet 1/3 so nho = 1/4 so lon

nhanh nha mik dang can

1) Tim  2 so a va b ( voi a > hoac = b ) biet rang a+b=270 va UCLN (a; b) = 45

GIUP MIK NHA CAC BAN MIK DANG CAN GAP LAM DAY CAC BAN IU 

Tim phan so co gia tri ko doi khi cong tu voi ̉ va cong mau vs ̣. giup mk vs mk dang can gap

viet ro ra ho mk nha

cho tap hop C = [2;5;8;...;2021]

a, tinh so phan tu cua tap hop C 

b, tim phan tu thu 101 cua tap hop C. 

giup minh voi minh dang can gap giai ra giup minh minh se like

Cho a,b,c la cac so nguyen duong.CMR: P=a/a+b + b/b+c + c/a+c khong la 1 so nguyen (dau "/" la dau gach phan so nhe)   GIUP MIK VS MIK DANG CAN GAP BN NAO GIAI DC MIK TICK NHA! help me