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Past exam of the mathematics course of the University of Cambridge / 2022 / ii / Paper 3 / 14A / d / Solution

The slow-roll approximation assumes
(112)
The first condition makes the energy density potential dominated, and the second neglects inertial acceleration relative to Hubble friction. The scalar and Friedmann equations reduce to
(113)
Solved by gpt-5.6-sol high.

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