求方程x²﹙x²-1﹚=y²﹙y²-1﹚的图像
问题描述:
求方程x²﹙x²-1﹚=y²﹙y²-1﹚的图像
答
∵x^2(x^2-1)=y^2(y^2-1),∴x^4-x^2+1/4=y^4-y^2+1/4,∴(x^2-1/2)^2=(y^2-1/2)^2,∴x^2-1/2=y^2-1/2,或x^2-1/2=1/2-y^2.由x^2-1/2=y^2-1/2,得:y^2=x^2,∴y=x,或y=-x.由x^2-1/2=1...