MEMO 2024 T1

Consider the two infinite sequences $a_0, a_1, a_2, \ldots$ and $b_0, b_1, b_2, \ldots$ of real numbers such that $a_0 = 0, b_0 = 0$ and $$a_{k+1} = b_k, \quad b_{k+1} = \frac{a_k b_k + a_k + 1}{b_k + 1}$$ for each integer $k \geq 0$. Prove that $a_{2024} + b_{2024} \geq 88$.