To find the explicit formula, we first solve the homogeneous part of the recurrence relation \( a_n = 2a_n-1 \), which gives \( a_n = C \cdot 2^n \) for some constant \( C \). Next, we find a particular solution for the non-homogeneous recurrence. Trying a constant solution \( a_n = A \): - Portal da Acústica