ch a,b,c E Z; A=a-b+c,B=-a+b+c. chung minh rang A va B la 2 so doi nhau

cho a,b,c la 3 so thuc doi mot khac nhau va khac khong, thoa man: a+1/b=b+1/c=c+1/a. hay chung minh rang abc=1 hoac abc=-1

a, Chung minh rang 5m+3 va 3m+2 la 2 so nguyen biet rang 1 so bang 10 ngen to cung nhau voi m la so nguyen to bat ky.

b,Tim 1 bo ba so nguyen to biet rang 1 so bang 10 phan tram tong cua 3 so can tim

Ai lam nhanh nhat minh tick cho

Cho a va b la 2 so nguyen to lien tiep lon hon 2. Chung minh rang : a+b tat ca tren 2 la hop so(Nho ghi cach giai ro rang )

Ai lam nhanh nhat,mk se tick cho!

1)CMR:(a+b-c)+(a-b)-(a-b-c)=a+b

2)chung minh A va B la hai so doi nhau biet:A=a-b+c;B=-a+b-c

3)cho a-b=1.tinhS biet :

S=-(a-b-c)+(-c+b+a)-(a+b)

ai lam duov 5 tick luon

1. khi nhan mot so thap phan co hai chu so o phan thap phan voi 12,35,mot ban da dat tich rieng thang cot voi nhau nhu doi voi phep cong va co ket qua la 220,66. Hay tim ket qua dung cua phep nhan do . Biet rang cac dau phay o cac thua so va ket qua van dat thang cot voi nhau ?

2.tim 2 so biet thuong cua chung bang 1,2 va biet hieu cua chung bang 13,58 ?

ai lam nhanh se duoc tick day ?

giai ho minh bai nay voi

cho a,b,c la do dai 3 canh tam giac va aⁿ;bⁿ;cⁿ cung la do dai 3 canh tam giac voi n la so nguyen duong. Chung minh rang 2 trong 3 so a,b,c bang nhau

Chung minh : a² va a+b la hai so nguyen to cung nhau .

    GIUP MINH VOI AI NHANH = DUNG , MINH TICK CHO NHA !

a,b thuoc Z , chung minh b-a va a-b la 2 so doi nhau