oblicz całke dori: ∫x³(2−x⁴)⁸dx

gwiazda: t=2−x⁴ dt=−4x³ dx/−4 ⁻¹₄dt=x³ dx ∫⁻¹₄ t⁸dt

student: ...=| t=2−x⁴ | = −1/4 ∫t⁸dt= −1/4 * 1/9*t⁹ +C= =1/36*(2−x⁴)⁹+C | dt = −4x³dx | | −dt/4=x³dx |