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=>(a1)(a1.r)(a1.r²) = 1000
(a1)³ . r³ = 1000
(a1 . r)³ = 10³
a1 . r = 10
=> a1.r + a1.r² = 30
a1.r + a1.r . r = 30
10 + 10r = 30
10r = 30 - 10
10r = 20
r = 20/10
r = 2
Hallando el Primer Término:
a1 . r = 10
a1(2) = 10
a1 = 10/2
a1 = 5
El primer termino es a1 = 5
El segundo termino es a1.r = 5(2) = 10
El tercer termino es a1.r² = 5(2)² = 5(4) = 20