Hello, We learnt in class that for a simple harmonic damped forced oscillation, the amplitude decreased exponentially over time. And for a completely undamped situation, the amplitude grows uncontrollably when the driver frequency matches the natural frequency of the driven. However, I wonder what will happen if the driver and driven frequency is not matched in an undamped situation. Would the amplitude also increase over time as no energy is lost but at a lower rate than when they match? Thank you in advance.