Answer:
an = (1 + 2·(n - 1))/2^(n - 1) = 2^(1 - n)·(2·n - 1)
sn = 6 - 2·0.5^n·(2·n + 3)
sin()=Sin(-0) =Sin 0=0
Option C Sin()=0
Also, using unit circle, Sin()=0
A thousand
a kilo means a thousand of anything such as kilometer or kiloton
4 times 8 is what equals 32