tim so tu nhien n de n(n+3) la so chinh phuong
tim x de 2^x+3^x+4^x la so chinh phuong
Tim cac so nguyen y sao cho bieu thuc 2377-9y^2-6y la binh phuong mot so tu nhien
a)Tim tat ca cac so nguyen duong x, y , z thoa man: \(\frac{x+y\sqrt{2013}}{y+z\sqrt{2013}}\)la so huu ti, dong thoi x2 + y2+ z2 la so nguyen to.
b) Tim so tu nhien x, y thoa man: x(1+x+x2) = y(y-1).
tim cac so tu nhien thoa man phuong trinh
\(x^2+2y^2=2377\)
a) Giai phuong trinh sau: \(\sqrt{x}-\sqrt{x+1}-\sqrt{x+4}+\sqrt{x+9}=0\)
b) Tim so tu nhien x, y thoa man: x( 1 + x +x2) = 4y( y - 1)
cho cac so x,y thoa man:x^4+x^2y^2+y^4-4=0
x^8+x^4y^4+y^8=8
A=x^12+x^2y^2+y^12 co gia tri la bao nhieu
co hay khong so tu nhien n de 2006 + n^2 la so chinh phuong.
Tim so tu nhien n sao cho n2 + 16n + 2011 la so chinh phuong.
