Datrys ∫ 2xleft(x^2+1right)^3 wrt x

$$\int{ 2x { \left( { x }^{ 2 } +1 \right) }^{ 3 } }d x$$

Enrhifo

$$\frac{x^{8}}{4}+x^{6}+\frac{3x^{4}}{2}+x^{2}+С$$

Camau Ateb

Defnyddio'r theorem binomaidd \left(a+b\right)^{3}=a^{3}+3a^{2}b+3ab^{2}+b^{3} i ehangu'r \left(x^{2}+1\right)^{3}.

$$\int 2x\left(\left(x^{2}\right)^{3}+3\left(x^{2}\right)^{2}+3x^{2}+1\right)\mathrm{d}x$$

I godi pŵer rhif i bŵer arall, lluoswch yr esbonyddion. Lluoswch 2 a 3 i gael 6.

$$\int 2x\left(x^{6}+3\left(x^{2}\right)^{2}+3x^{2}+1\right)\mathrm{d}x$$

I godi pŵer rhif i bŵer arall, lluoswch yr esbonyddion. Lluoswch 2 a 2 i gael 4.

$$\int 2x\left(x^{6}+3x^{4}+3x^{2}+1\right)\mathrm{d}x$$

Defnyddio’r briodwedd ddosbarthu i luosi 2x â x^{6}+3x^{4}+3x^{2}+1.

$$\int 2x^{7}+6x^{5}+6x^{3}+2x\mathrm{d}x$$

Integreiddio'r swm fesul term.

$$\int 2x^{7}\mathrm{d}x+\int 6x^{5}\mathrm{d}x+\int 6x^{3}\mathrm{d}x+\int 2x\mathrm{d}x$$

Ffactoreiddio allan y cysonyn ym mhob un o'r termau.

$$2\int x^{7}\mathrm{d}x+6\int x^{5}\mathrm{d}x+6\int x^{3}\mathrm{d}x+2\int x\mathrm{d}x$$

Ers \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} ar gyfer k\neq -1, disodli \int x^{7}\mathrm{d}x gyda \frac{x^{8}}{8}. Lluoswch 2 â \frac{x^{8}}{8}.

$$\frac{x^{8}}{4}+6\int x^{5}\mathrm{d}x+6\int x^{3}\mathrm{d}x+2\int x\mathrm{d}x$$

Ers \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} ar gyfer k\neq -1, disodli \int x^{5}\mathrm{d}x gyda \frac{x^{6}}{6}. Lluoswch 6 â \frac{x^{6}}{6}.

$$\frac{x^{8}}{4}+x^{6}+6\int x^{3}\mathrm{d}x+2\int x\mathrm{d}x$$

Ers \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} ar gyfer k\neq -1, disodli \int x^{3}\mathrm{d}x gyda \frac{x^{4}}{4}. Lluoswch 6 â \frac{x^{4}}{4}.

$$\frac{x^{8}}{4}+x^{6}+\frac{3x^{4}}{2}+2\int x\mathrm{d}x$$

Ers \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} ar gyfer k\neq -1, disodli \int x\mathrm{d}x gyda \frac{x^{2}}{2}. Lluoswch 2 â \frac{x^{2}}{2}.

$$\frac{x^{8}}{4}+x^{6}+\frac{3x^{4}}{2}+x^{2}$$

Os yw F\left(x\right) yn integryn amhendant o f\left(x\right), yna bydd F\left(x\right)+C yn rhoi’r set o holl integrynnau amhendant f\left(x\right). Felly, ychwanegwch gysonyn yr integryn C\in \mathrm{R} at y canlyniad.

$$x^{2}+\frac{3x^{4}}{2}+x^{6}+\frac{x^{8}}{4}+С$$

Gwahaniaethu w.r.t. x

$$2x\left(x^{2}+1\right)^{3}$$