Suppose the masses of stars are distributed according

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Suppose the masses of stars are distributed according to f(M)dM == M^-2 dM. Assume you can use the luminostiy mass relation L == M^3. (Both a and b are constants.) What is teh corresponding distribution function for luminosities, g(L), such that g(L)dL gives the number of stars with luminosities between L and L+dL?

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