How do I find the sum of the first 11 terms of the sequence 768,384,192,96...

Question

I need help figuring out this sequence 

Answer 1

S_n = a₁(1 - rⁿ) / (1 - r)

 

S₁₁ = 768(1 - 0.5¹¹) / 0.5

S₁₁ = 768(1 - 0.00048828125) / 0.5

S₁₁ = 768(0.99951) / 0.5

S₁₁ = 767.625 / 0.5

S₁₁ = 1535.25

 

Answer 2

768
384
192
96
48
24
12
6
3
1.5
0.75

---------
1535.25 <---- total