- In a geometric series, S4=20 ans S7= 546.5 Find the common ratio if r > 1?

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When was the last damaging earthquake in California? What about Orange County? (fuvest)- considere o sistema de equações lineares: {x + y + z = -2m {x - y - 2z = 2m { 2x +y - 2z = 3m + 5? Is this the unified field equation Einstein was tried to find; T =E / (B x G).
where t is time E is electric ,B is magnetic,G is gravity? If n is positive integer then 2n^4 - 41n^3 + 18n^2 + 63n + 23, 40n^4 - 89n^3 + 64n^2 + 99n + 57 are not both prime. Proof or counterexample? Why is the world's population unevenly distributed?