If this is a geometric progression, then it is , , , , for some . From here, you can find .
A machine is required to have 5 speeds, lowest being 60 rev/min and the highest being 680 rev/min. state the complete range of speeds i) in AP and ii) in GP
i have done the AP part, i am a little stuck with where to start with the GP part as i have the 1st and 5th terms of the sequence
a starting pointer would be helpful if anyone could give me a pointer thanx