<Dd> <Dl> <Dd> l x + 1 = l x ⋅ (1 − q x) = l x ⋅ p x (\ displaystyle \, \ ell _ (x + 1) = \ ell _ (x) \ cdot (1 - q_ (x)) = \ ell _ (x) \ cdot p_ (x)) </Dd> <Dd> l x + 1 l x = p x (\ displaystyle \, (\ ell _ (x + 1) \ over \ ell _ (x)) = p_ (x)) </Dd> </Dl> </Dd> <Dl> <Dd> l x + 1 = l x ⋅ (1 − q x) = l x ⋅ p x (\ displaystyle \, \ ell _ (x + 1) = \ ell _ (x) \ cdot (1 - q_ (x)) = \ ell _ (x) \ cdot p_ (x)) </Dd> <Dd> l x + 1 l x = p x (\ displaystyle \, (\ ell _ (x + 1) \ over \ ell _ (x)) = p_ (x)) </Dd> </Dl> <Dd> l x + 1 = l x ⋅ (1 − q x) = l x ⋅ p x (\ displaystyle \, \ ell _ (x + 1) = \ ell _ (x) \ cdot (1 - q_ (x)) = \ ell _ (x) \ cdot p_ (x)) </Dd> <Dd> l x + 1 l x = p x (\ displaystyle \, (\ ell _ (x + 1) \ over \ ell _ (x)) = p_ (x)) </Dd>

Morbidity means the state of being subject to death