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Наведені нижче формули:
k1=f(t,y)k_1 = f(t, y)k2=f(t+h2, y+h2k1)k_2 = f\left(t + \frac{h}{2},\, y + \frac{h}{2}k_1\right)k3=f(t+h2, y+h2k2)k_3 = f\left(t + \frac{h}{2},\, y + \frac{h}{2}k_2\right)k4=f(t+h, y+hk3)k_4 = f\left(t + h,\, y + hk_3\right)yn+1=yn+h6(k1+2k2+2k3+k4)y_{n+1} = y_n + \frac{h}{6}(k_1 + 2k_2 + 2k_3 + k_4)Що це за формули?