Các câu hỏi tương tự
cho a,b,c,d la cac so nguyen duong doi 1 khac nhau thoa man a/a+b + b/b+c + c/c+d + d/d+a =2
CMR abcd la 1 so chinh phuong
cho cac so nguyen duong a,b,c thoa man :(a,b,c)=1;ab=c(a+b).Cm a+b la so chinh phuong
cho so nguyen to p va cac so duong x,y thoa man 4x^2-3xy-y^2-p(3x+2y)=2p^2 CHUNG MINH RANG 5x-1 la so chinh phuong
co cac so nguyen duong a,b.c nguyen to cung nhau tm (a+b)=ab cmr a+b la co chinh phuong
giai ho minh voi minh can gap lam ai tra loi minh tich cho
1 tim cac so nguyen x thoa man 1 trong cac dieu kien sau
a) 2x+1 la scp
b) 4x=1 la scp
c)8x+1 la scp
2 tim nguyen tu nhien cua phuong trinh x^2-y^2=y+1
Cho a,b la cac so huu ti thoa man a2n+1 + b2n+1 =2anbn
Chung minh 1-ab la binh phuong cua 1 so huu ti
biet x,y,m,n la cac so nguyen thoa man: x+y=m+n. chung minh S=x^2+y^2+m^2+n^2 luon =bang cac binh phuong cua 3 so nguyen
tim x,y de thoa man
a) n^2-4xy+7 la so chinh phuong
b) n^2-3n-1 la so chinh phuong
Tim so nguyen n de
a, n2 -5
b, n2-4n +3
La cac so chinh phuong