Lutasin ang ∫ (from 2 to 7) of (4112x-(2(x-2))(-x-2/2))(7/23)

$$\int _ { 2 } ^ { 7 } ( 4112 x - ( 2 ( x - 2 ) ) ( - \frac { x - 2 } { 2 } ) ) ( \frac { 7 } { 23 } )$$

I-evaluate

$$\frac{1943795}{69}\approx 28170.942028986$$

Mga Hakbang ng Solution

I-cancel out ang 2 at 2.

$$\int _{2}^{7}\left(4112x-\left(-\left(x-2\right)\left(x-2\right)\right)\right)\times \frac{7}{23}\mathrm{d}x$$

Gamitin ang distributive property para i-multiply ang -\left(x-2\right) gamit ang x-2.

$$\int _{2}^{7}\left(4112x-\left(-\left(x-2\right)x+2x-4\right)\right)\times \frac{7}{23}\mathrm{d}x$$

Gamitin ang distributive property para i-multiply ang -1 gamit ang x-2.

$$\int _{2}^{7}\left(4112x-\left(\left(-x+2\right)x+2x-4\right)\right)\times \frac{7}{23}\mathrm{d}x$$

Gamitin ang distributive property para i-multiply ang -x+2 gamit ang x.

$$\int _{2}^{7}\left(4112x-\left(-x^{2}+2x+2x-4\right)\right)\times \frac{7}{23}\mathrm{d}x$$

Pagsamahin ang 2x at 2x para makuha ang 4x.

$$\int _{2}^{7}\left(4112x-\left(-x^{2}+4x-4\right)\right)\times \frac{7}{23}\mathrm{d}x$$

Para hanapin ang kabaligtaran ng -x^{2}+4x-4, hanapin ang kabaligtaran ng bawat term.

$$\int _{2}^{7}\left(4112x-\left(-x^{2}\right)-4x-\left(-4\right)\right)\times \frac{7}{23}\mathrm{d}x$$

Ang kabaliktaran ng -x^{2} ay x^{2}.

$$\int _{2}^{7}\left(4112x+x^{2}-4x-\left(-4\right)\right)\times \frac{7}{23}\mathrm{d}x$$

Ang kabaliktaran ng -4 ay 4.

$$\int _{2}^{7}\left(4112x+x^{2}-4x+4\right)\times \frac{7}{23}\mathrm{d}x$$

Pagsamahin ang 4112x at -4x para makuha ang 4108x.

$$\int _{2}^{7}\left(4108x+x^{2}+4\right)\times \frac{7}{23}\mathrm{d}x$$

Gamitin ang distributive property para i-multiply ang 4108x+x^{2}+4 gamit ang \frac{7}{23}.

$$\int _{2}^{7}4108x\times \frac{7}{23}+x^{2}\times \frac{7}{23}+4\times \frac{7}{23}\mathrm{d}x$$

Ipakita ang 4108\times \frac{7}{23} bilang isang single fraction.

$$\int _{2}^{7}\frac{4108\times 7}{23}x+x^{2}\times \frac{7}{23}+4\times \frac{7}{23}\mathrm{d}x$$

I-multiply ang 4108 at 7 para makuha ang 28756.

$$\int _{2}^{7}\frac{28756}{23}x+x^{2}\times \frac{7}{23}+4\times \frac{7}{23}\mathrm{d}x$$

Ipakita ang 4\times \frac{7}{23} bilang isang single fraction.

$$\int _{2}^{7}\frac{28756}{23}x+x^{2}\times \frac{7}{23}+\frac{4\times 7}{23}\mathrm{d}x$$

I-multiply ang 4 at 7 para makuha ang 28.

$$\int _{2}^{7}\frac{28756}{23}x+x^{2}\times \frac{7}{23}+\frac{28}{23}\mathrm{d}x$$

Suriin muna ang indefinite na integral.

$$\int \frac{28756x+7x^{2}+28}{23}\mathrm{d}x$$

I-integrate ang sum sa bawat term.

$$\int \frac{28756x}{23}\mathrm{d}x+\int \frac{7x^{2}}{23}\mathrm{d}x+\int \frac{28}{23}\mathrm{d}x$$

I-factor out ang constant sa bawat mga term.

$$\frac{28756\int x\mathrm{d}x}{23}+\frac{7\int x^{2}\mathrm{d}x}{23}+\int \frac{28}{23}\mathrm{d}x$$

Simula \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} para sa k\neq -1, palitan ang \int x\mathrm{d}x ng \frac{x^{2}}{2}. I-multiply ang \frac{28756}{23} times \frac{x^{2}}{2}.

$$\frac{14378x^{2}}{23}+\frac{7\int x^{2}\mathrm{d}x}{23}+\int \frac{28}{23}\mathrm{d}x$$

Simula \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} para sa k\neq -1, palitan ang \int x^{2}\mathrm{d}x ng \frac{x^{3}}{3}. I-multiply ang \frac{7}{23} times \frac{x^{3}}{3}.

$$\frac{14378x^{2}}{23}+\frac{7x^{3}}{69}+\int \frac{28}{23}\mathrm{d}x$$

Hanapin ang integral ng \frac{28}{23} gamit ang alituntunin ng talahanayan ng mga karaniwang integral \int a\mathrm{d}x=ax.

$$\frac{14378x^{2}}{23}+\frac{7x^{3}}{69}+\frac{28x}{23}$$

Ang definite integral ay ang antiderivative ng expression na na-evaluate sa upper limit ng integration minus ang antiderivative na na-evaluate sa lower limit ng integration.

$$\frac{14378}{23}\times 7^{2}+\frac{7}{69}\times 7^{3}+\frac{28}{23}\times 7-\left(\frac{14378}{23}\times 2^{2}+\frac{7}{69}\times 2^{3}+\frac{28}{23}\times 2\right)$$

Pasimplehin.

$$\frac{1943795}{69}$$