Engineering, 21.10.2020 16:01 raiderries

The electric power P (in W) produced by a certain battery is given by: P= 49r/ (r+0.8)^2, where r is the resistance in the circuit. For what value of r is the power a maximum?

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The electric power P (in W) produced by a certain battery is given by: P= 49r/ (r+0.8)^2, where r i...