EN
We study the local well-posed integrated Cauchy problem
$v'(t) = Av(t) + (t^{α})/Γ(α+1)x$, v(0) = 0, t ∈ [0,κ),
with κ > 0, α ≥ 0, and x ∈ X, where X is a Banach space and A a closed operator on X. We extend solutions increasing the regularity in α. The global case (κ = ∞) is also treated in detail. Growth of solutions is given in both cases.