33. The temperature of a solid at time \( t \geq 0 \) is modeled by the nonconstant function \( H \) and increases according to the differential equation: \[ \frac{dH}{dt} = 2H + 1 \] where \( H(t) \) is measured in degrees Fahrenheit and \( t \) is measured in hours. Which of the following must be true?
Answer is: option4
Solution:
\( \ln |2H + 1| = 2t + C \)
