Respuesta :

apologiabiology
sum is
[tex] S_{n}=\frac{a_{1}(1-r^{n})}{1-r} [/tex]

r=common ratio
a1=first term
it looks like 2^0=1 is the first term aka a1
it goes to the 9th term (2^9)

sub
[tex] S_{9}=\frac{1(1-(2)^{9})}{1-2} [/tex]
[tex] S_{9}=\frac{1-512}{-1} [/tex]
[tex] S_{9}=\frac{-511}{-1} [/tex]
[tex] S_{9}=511 [/tex]

brenhuls
so this one you don't multiply the base by the exponent. in this case its 2 times two how ever many time the exponent says.
2^0= 2
2^1= 2
2^2=4
2^3= 8
2^4=16
2^5=32
2^6=64
2^7=128
2^8=256
2^9=512
 So then you add all them up 
2+2+4+8+16+32+64+128+256+512= 1024

so there is your answer 1024