raquelsalazar
raquelsalazar
11-05-2018
Mathematics
contestada
Due tomorrow please help
Respuesta :
sqdancefan
sqdancefan
11-05-2018
For some of these, a calculator is helpul.
The sum is 294903.
_____
This is the sum of 15 terms of a geometric sequence with first term 9 and common ratio 2. That sum is given by the formula
[tex]S_{n}=a\dfrac{r^{n}-1}{r-1}[/tex]
[tex]S_{15}=9\dfrac{2^{15}-1}{2-1}=9\cdot(32768-1)=294903[/tex]
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