V
vuotlensophan


P=[TEX]\frac{(a-b)(2a-1)}{a(a-b+c)}[/TEX].
M= [TEX]\frac{{{x}_{1}}^{4}+{{x}_{2}}^{4}+{{x}_{3}}^{4}+{{x}_{4}}^{4}}{{{x}_{1}}^{3}+{{x}_{2}}^{3}+{{x}_{3}}^{3}+{{x}_{4}}^{3}}[/TEX]
A=[TEX]\frac{x}{{x}^{4}+{y}^{4}}+\frac{y}{{x}^{2}+{y}^{4}}[/TEX]
GIAI PT
a) [TEX]4{x}^{2}-4x-10=\sqrt{8{x}^{2}-6x-10}[/TEX]
b)[TEX](2-x)\sqrt{x-1}-\sqrt{2}x+2=0[/TEX]
c)[TEX]\sqrt{\frac{x+7}{x+1}}+8=2{x}^{2}+\sqrt{2x-1}[/TEX]
d)[TEX](4x-1)\sqrt{{x}^{2}+1}=2{x}^{2}+2x+1[/TEX]
e) [TEX]5\sqrt{{x}^{3}+3{x}^{2}+3x+2}=2({x}^{2}+2x+3)[/TEX]
f) [TEX]4(\sqrt{2x-1}-2{x}^{2}+x)+\sqrt{x+\sqrt{2x-1}}(\sqrt{2x-1}-2{x}^{2}+x+4)+x\sqrt{2}(\sqrt{2x-1}-2{x}^{2}+x-4)=0[/TEX]