Datrys ∫ (from 1 to x) of f(t)dt=x^3-x^2+ax

$$\int _ { 1 } ^ { x } f ( t ) d t = x ^ { 3 } - x ^ { 2 } + a x$$

Datrys ar gyfer a

$$\left\{\begin{matrix}a=\frac{\left(x-1\right)\left(f+fx-2x^{2}\right)}{2x}\text{, }&x\neq 0\\a\in \mathrm{R}\text{, }&x=0\text{ and }f=0\end{matrix}\right.$$

Camau ar gyfer Datrys Hafaliad Llinol

Cyfnewidiwch yr ochrau fel bod yr holl dermau newidiol ar yr ochr chwith.

$$x^{3}-x^{2}+ax=\int _{1}^{x}ft\mathrm{d}t$$

Tynnu x^{3} o'r ddwy ochr.

$$-x^{2}+ax=\int _{1}^{x}ft\mathrm{d}t-x^{3}$$

Ychwanegu x^{2} at y ddwy ochr.

$$ax=\int _{1}^{x}ft\mathrm{d}t-x^{3}+x^{2}$$

Mae'r hafaliad yn y ffurf safonol.

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

Rhannu’r ddwy ochr â x.

$$\frac{xa}{x}=\frac{\left(x-1\right)\left(f+fx-2x^{2}\right)}{2x}$$

Mae rhannu â x yn dad-wneud lluosi â x.

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

Datrys ar gyfer f

$$\left\{\begin{matrix}f=-\frac{x\left(-x^{2}+x-a\right)}{t\left(x-1\right)}\text{, }&x\neq 1\text{ and }t\neq 0\\f\in \mathrm{R}\text{, }&\left(a=0\text{ and }x=1\right)\text{ or }\left(a\leq \frac{1}{4}\text{ and }t=0\text{ and }x=\frac{-\sqrt{1-4a}+1}{2}\right)\text{ or }\left(x=\frac{\sqrt{1-4a}+1}{2}\text{ and }a\leq \frac{1}{4}\text{ and }t=0\text{ and }a\neq 0\right)\text{ or }\left(t=0\text{ and }x=0\right)\end{matrix}\right.$$