#### 157.63Question: A climatologist models the rate of ice melt $ M(t) $ at time $ t $ (in years) as $ M(t) = t - \fract^33 $. If $ b_n $ is defined recursively by $ b_1 = 1 $ and $ b_n+1 = M(b_n) $, compute $ b_4 $. - Portal da Acústica