https://www.glc.us.es/~jalonso/calculemus/si-a-b-%e2%88%88-%e2%84%9d-tales-que-a-%e2%89%a4-b-entonces-log1-e%e1%b5%83-%e2%89%a4-log1-e%e1%b5%87/
Si a, b ∈ ℝ tales que a ≤ b, entonces log(1 + eᵃ) ≤ log(1 + eᵇ)