1.
y' = yx - 3x^2*y = y*(x - 3x^2)
y'/y = x - 3x^2 | интегрирование:
lny = x^2/2 - x^3 + lnC | e^
y = C * e^(x^2/2 - x^3)
2.
2y' + y^2*x^7 + 8xy^2 = 0
- 2y' / y^2 = x^7 + 8x
2/y = x^8/8 + 4x^2 + 2C
y = 1/(2x^2 + x^8/16 + C)
1.
y' = yx - 3x^2*y = y*(x - 3x^2)
y'/y = x - 3x^2 | интегрирование:
lny = x^2/2 - x^3 + lnC | e^
y = C * e^(x^2/2 - x^3)
2.
2y' + y^2*x^7 + 8xy^2 = 0
- 2y' / y^2 = x^7 + 8x
2/y = x^8/8 + 4x^2 + 2C
y = 1/(2x^2 + x^8/16 + C)