Respuesta: d)
x ∈ [-2,1] ⇒ -2 ≤ x ≤ 1
⇒ -3 ≤ -3x ≤ 6
⇒ -1 ≤-3x+2 ≤8
⇒ y ∈ [-1,8]
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Respuesta: d)
x ∈ [-2,1] ⇒ -2 ≤ x ≤ 1
⇒ -3 ≤ -3x ≤ 6
⇒ -1 ≤-3x+2 ≤8
⇒ y ∈ [-1,8]