Final answer:
The first IF amplifier stage in a receiver is responsible for signal amplification to strengthen the incoming signal before further processing.
Step-by-step explanation:
The purpose of the first IF (Intermediate Frequency) amplifier stage in a receiver is signal amplification. The IF amplifier boosts the strength of the signal after it has been initially tuned to the desired frequency but before it is further processed for details like audio content. In radio communication, the amplified signal undergoes various stages of processing, including frequency or amplitude demodulation, to ultimately retrieve and reproduce the audio or data signals intended for transmission.