# Problem calculating the integral

Posted 14 days ago
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 Hello , I Hope You 're fine , I have a problem calculating the integral of a 1 / H [ hubbl parametre ] in MATHEMATICA but the latter does not give me the result of this integration ,is there another method in Mathematics to calculate it?
 Do you have any reason to think there is a closed form? Most integrals don't have one. Maybe the best you can do is numerical methods.In this case only way is NIntegrate:  H[z_, h_, Ωm_, ωd_, Ωr_] := 100 h Sqrt[Ωr (1 + z)^4 + Ωm (1 + z)^3 + (1 - Ωm - Ωr) (1 + z)^(3 (1 + ωd))] NIntegrate[1/H[z, 5, 1/2, 1/3, 1/4], {z, 0, 3}] (*0.00167544*)