Respuesta :

Answer:

u₂ =  5

u₃ =  53

u₄ =  5621

Step-by-step explanation:

u₁ = 1

uₙ₊₁ = 2(uₙ)² + 3

u₂ = u₁₊₁ = 2ₓu₁² + 3 = 2*1² + 3 = 5

u₃ = u₂₊₁ = 2*u₂² + 3 = 2*5² + 3 = 53

u₄ = 2*u₃² + 3 = 2*53² + 3 = 5621