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Solve the friedmann equation to get the scale factor as a

Consider a universe where the matter density is 0, and it has a significant cosmological constant lambda. Assume the curvature, k, is 0.
a. Solve the Friedmann equation to get the scale factor as a function of time.
b. How old is the universe in this case?
c. Calculate the value of the deceleration parameter, q0, from your answer in part a.

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Physics: Solve the friedmann equation to get the scale factor as a

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