T
thaithuylinh123


scho bieu thuc:
P(x)=\frac{2x-\sqrt{x^2}-1}{3x^2-4x+1}
1)Tim tat ca cac gia tri cua x de P(x)xac dinh. Rut gon P(x)
2) Chung minh rang neu x\sqsupset 1thi P(x)*P(-x)\sqsubet 0
3)Giai phuong trinh:
\sqrt{\frac{2x}{1+x}}+ \sqrt{\frac{1}{2}+\frac{1}{2x}}=2
P(x)=\frac{2x-\sqrt{x^2}-1}{3x^2-4x+1}
1)Tim tat ca cac gia tri cua x de P(x)xac dinh. Rut gon P(x)
2) Chung minh rang neu x\sqsupset 1thi P(x)*P(-x)\sqsubet 0
3)Giai phuong trinh:
\sqrt{\frac{2x}{1+x}}+ \sqrt{\frac{1}{2}+\frac{1}{2x}}=2