Réitigh ∫ left(3x+2right)^3 wrt x

$$\int{ { \left(3x+2 \right) }^{ 3 } }d x$$

Luacháil

$$\frac{\left(3x+2\right)^{4}}{12}+С$$

Céimeanna Réitigh

Úsáid an teoirim dhéthéarmach \left(a+b\right)^{3}=a^{3}+3a^{2}b+3ab^{2}+b^{3} chun \left(3x+2\right)^{3} a leathnú.

$$\int 27x^{3}+54x^{2}+36x+8\mathrm{d}x$$

Measc an tsuim téarma fá téarma.

$$\int 27x^{3}\mathrm{d}x+\int 54x^{2}\mathrm{d}x+\int 36x\mathrm{d}x+\int 8\mathrm{d}x$$

Fág an leanúnach sna téarmaí as an áireamh.

$$27\int x^{3}\mathrm{d}x+54\int x^{2}\mathrm{d}x+36\int x\mathrm{d}x+\int 8\mathrm{d}x$$

Ó \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} fá choinne k\neq -1, athchuir \int x^{3}\mathrm{d}x le \frac{x^{4}}{4}. Méadaigh 27 faoi \frac{x^{4}}{4}.

$$\frac{27x^{4}}{4}+54\int x^{2}\mathrm{d}x+36\int x\mathrm{d}x+\int 8\mathrm{d}x$$

Ó \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} fá choinne k\neq -1, athchuir \int x^{2}\mathrm{d}x le \frac{x^{3}}{3}. Méadaigh 54 faoi \frac{x^{3}}{3}.

$$\frac{27x^{4}}{4}+18x^{3}+36\int x\mathrm{d}x+\int 8\mathrm{d}x$$

Ó \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} fá choinne k\neq -1, athchuir \int x\mathrm{d}x le \frac{x^{2}}{2}. Méadaigh 36 faoi \frac{x^{2}}{2}.

$$\frac{27x^{4}}{4}+18x^{3}+18x^{2}+\int 8\mathrm{d}x$$

Aimsigh suimeálaithe do 8 ag baint úsáid as an tábla do suimeálaithe coitianta riail\int a\mathrm{d}x=ax.

$$\frac{27x^{4}}{4}+18x^{3}+18x^{2}+8x$$

Má tá F\left(x\right) mar frithdhíorthach do f\left(x\right), beidh tacar do frithdhíorthach uile do f\left(x\right) a thabhairt ag F\left(x\right)+C. Mar sin de, cur an comhtháthú leanúnach C\in \mathrm{R} don toradh.

$$\frac{27x^{4}}{4}+18x^{3}+18x^{2}+8x+С$$

Difreálaigh w.r.t. x

$$\left(3x+2\right)^{3}$$