Réitigh f(x)=(x+2x^3)^4a=-1

$$f ( x ) = ( x + 2 x ^ { 3 } ) ^ { 4 } a = - 1$$

Réitigh do a.

$$a=-\frac{1}{\left(2x^{3}+x\right)^{4}}$$

$$x\neq 0$$

Céimeanna chun Cothromóidí Líneacha a Réiteach

Tá an chothromóid i bhfoirm chaighdeánach.

$$\left(2x^{3}+x\right)^{4}a=-1$$

Roinn an dá thaobh faoi \left(x+2x^{3}\right)^{4}.

$$\frac{\left(2x^{3}+x\right)^{4}a}{\left(2x^{3}+x\right)^{4}}=-\frac{1}{\left(2x^{3}+x\right)^{4}}$$

Má roinntear é faoi \left(x+2x^{3}\right)^{4} cuirtear an iolrúchán faoi \left(x+2x^{3}\right)^{4} ar ceal.

$$a=-\frac{1}{\left(2x^{3}+x\right)^{4}}$$

Roinn -1 faoi \left(x+2x^{3}\right)^{4}.

$$a=-\frac{1}{\left(x\left(2x^{2}+1\right)\right)^{4}}$$

Réitigh do x.

$$x=\frac{\sqrt[3]{6\sqrt{6+81\sqrt{-\frac{1}{a}}}+54\sqrt[4]{-\frac{1}{a}}}+\sqrt[3]{-6\sqrt{6+81\sqrt{-\frac{1}{a}}}+54\sqrt[4]{-\frac{1}{a}}}}{6}$$

$$x=\frac{\sqrt[3]{6\sqrt{6+81\sqrt{-\frac{1}{a}}}-54\sqrt[4]{-\frac{1}{a}}}-\sqrt[3]{6\sqrt{6+81\sqrt{-\frac{1}{a}}}+54\sqrt[4]{-\frac{1}{a}}}}{6}\text{, }a<0$$