The rate (in mg carbon/m3/h) at which photosynthesis takes place for a species of phytoplankton is modeled by the function

P =
100I / I2 + I + 9
where I is the light intensity (measured in thousands of foot-candles). For what light intensity is P a maximum?

1 answer

Can't make out your equation, is it
P = 100I / (I^2 + I + 9) ?