Riješi ∫ (5x^3+4)^2(15x^2+4) wrt x

$$\int ( 5 x ^ { 3 } + 4 ) ^ { 2 } ( 15 x ^ { 2 } + 4 ) d x$$

Izračunaj

$$\frac{125x^{9}}{3}+\frac{100x^{7}}{7}+100x^{6}+40x^{4}+80x^{3}+64x+С$$

Koraci rješenja

Upotrijebite binomni teorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} da biste proširili \left(5x^{3}+4\right)^{2}.

$$\int \left(25\left(x^{3}\right)^{2}+40x^{3}+16\right)\left(15x^{2}+4\right)\mathrm{d}x$$

Da biste izračunali potenciju potencije, pomnožite eksponente. Pomnožite 3 i 2 da biste dobili 6.

$$\int \left(25x^{6}+40x^{3}+16\right)\left(15x^{2}+4\right)\mathrm{d}x$$

Koristite svojstvo distributivnosti da biste pomnožili 25x^{6}+40x^{3}+16 s 15x^{2}+4.

$$\int 375x^{8}+100x^{6}+600x^{5}+160x^{3}+240x^{2}+64\mathrm{d}x$$

Integrirajte zbroj termina po terminu.

$$\int 375x^{8}\mathrm{d}x+\int 100x^{6}\mathrm{d}x+\int 600x^{5}\mathrm{d}x+\int 160x^{3}\mathrm{d}x+\int 240x^{2}\mathrm{d}x+\int 64\mathrm{d}x$$

Izbacite konstantu u svakom od izraza.

$$375\int x^{8}\mathrm{d}x+100\int x^{6}\mathrm{d}x+600\int x^{5}\mathrm{d}x+160\int x^{3}\mathrm{d}x+240\int x^{2}\mathrm{d}x+\int 64\mathrm{d}x$$

Od \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} za k\neq -1, zamijenite \int x^{8}\mathrm{d}x s \frac{x^{9}}{9}. Pomnožite 375 i \frac{x^{9}}{9}.

$$\frac{125x^{9}}{3}+100\int x^{6}\mathrm{d}x+600\int x^{5}\mathrm{d}x+160\int x^{3}\mathrm{d}x+240\int x^{2}\mathrm{d}x+\int 64\mathrm{d}x$$

Od \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} za k\neq -1, zamijenite \int x^{6}\mathrm{d}x s \frac{x^{7}}{7}. Pomnožite 100 i \frac{x^{7}}{7}.

$$\frac{125x^{9}}{3}+\frac{100x^{7}}{7}+600\int x^{5}\mathrm{d}x+160\int x^{3}\mathrm{d}x+240\int x^{2}\mathrm{d}x+\int 64\mathrm{d}x$$

Od \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} za k\neq -1, zamijenite \int x^{5}\mathrm{d}x s \frac{x^{6}}{6}. Pomnožite 600 i \frac{x^{6}}{6}.

$$\frac{125x^{9}}{3}+\frac{100x^{7}}{7}+100x^{6}+160\int x^{3}\mathrm{d}x+240\int x^{2}\mathrm{d}x+\int 64\mathrm{d}x$$

Od \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} za k\neq -1, zamijenite \int x^{3}\mathrm{d}x s \frac{x^{4}}{4}. Pomnožite 160 i \frac{x^{4}}{4}.

$$\frac{125x^{9}}{3}+\frac{100x^{7}}{7}+100x^{6}+40x^{4}+240\int x^{2}\mathrm{d}x+\int 64\mathrm{d}x$$

Od \int x^{k}\mathrm{d}x=\frac{x^{k+1}}{k+1} za k\neq -1, zamijenite \int x^{2}\mathrm{d}x s \frac{x^{3}}{3}. Pomnožite 240 i \frac{x^{3}}{3}.

$$\frac{125x^{9}}{3}+\frac{100x^{7}}{7}+100x^{6}+40x^{4}+80x^{3}+\int 64\mathrm{d}x$$

Pronađite integral 64 pomoću tablice uobičajene integrali pravila \int a\mathrm{d}x=ax.

$$\frac{125x^{9}}{3}+\frac{100x^{7}}{7}+100x^{6}+40x^{4}+80x^{3}+64x$$

Pojednostavnite.

$$80x^{3}+64x+100x^{6}+40x^{4}+\frac{125x^{9}}{3}+\frac{100x^{7}}{7}$$

Ako je F\left(x\right) antiderivat f\left(x\right), skup svih antiderivata f\left(x\right) je dan u F\left(x\right)+C. Stoga dodajte konstantu integracije C\in \mathrm{R} rezultatu.

$$80x^{3}+64x+100x^{6}+40x^{4}+\frac{125x^{9}}{3}+\frac{100x^{7}}{7}+С$$

Diferenciraj u odnosu na x

$$\left(15x^{2}+4\right)\left(5x^{3}+4\right)^{2}$$