Question

Si t * r = rt + t y t ∆ r = 3t - 2r, entonces ((-1) * 2) ∆ (-4) es igual a

Answer 1

1) t*r = rt+t
2) t∆r = 3t-2r

((-1)*2)∆(-4) = (2×(-1)+(-1))∆(-4)
(-2-1)∆(-4) = -3∆-4 = 3(-3)-2(-4) = -9+8 = -1

Respuesta => -1

Saludos Ariel