Question: 15.28 For a Friedmann model dominated by a single source of energy density, show that 07 - 1 0,'(2)-1=; (1 + 2) 1+3, where

15.28 For a Friedmann model dominated by a single source of energy density, show that 07 - 1 0,'(2)-1=; (1 + 2) 1+3, " where w, is the equation-of-state parameter of the source. Use this result to comment on the flatness

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