the question in English is
The sum of the first twelve terms of a Pg of ratio 3 is 265,720. Determine the first term
we know that
When we need to sum a Geometric Sequence the formula is equal to
therefore
the answer is
the first term is equal to 1
the answer in Portuguese
nós sabemos isso
Quando precisamos somar uma Seqüência Geométrica, a fórmula é igual a
assim sendo
a resposta é
o primeiro termo é igual a 1