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resolver cada ejercicio por los tres métodos: método de costo total, costo promedio, costo marginal con su respectiva parábola:
4y= 20 + x + 2x
y = 10 + 3x + 1/2x²
2y= 30 + 5x + 5x
3y = 12+ 2x + x
4y = 50+ x + 4x²​