Question: 28. Variable stars alternately increase and decrease in brightness. Most observable variable stars, such as Delta Ceu, have a maximum brightness period of 5.4 days,

28. Variable stars alternately increase and decrease in brightness. Most observable variable stars, such as Delta Ceu, have a maximum brightness period of 5.4 days, an average brightness (luminosity) of a star of 4.0, and the value of this brightness varies by 0.35 luminosity. Find a suitable model as a function of luminance versus time for delta Cepheus

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