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
[tex] Sum=a1*[\frac{1-r^{n}}{1-r} ] \\ 265,720=a1*[\frac{1-3^{12}}{1-3} ]\\ 265.720=a1*[265,720]\\ a1=1 [/tex]
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
[tex] Soma=a1*[\frac{1-r^{n}}{1-r} ] \\ 265,720=a1*[\frac{1-3^{12}}{1-3} ]\\ 265.720=a1*[265,720]\\ a1=1 [/tex]
assim sendo
a resposta é
o primeiro termo é igual a 1
