Question

\frac{1}{2^3}+\frac{1}{2^6}+\frac{1}{2^9}+ . . . = ?
a: \frac{1}{7}
b:\frac{1}{6}
c:\frac{1}{5}
d:\frac{1}{4}

Answer 1

⊙_⊙

๏_๏

( • ̀ω•́ ) I don't know

Answer 2

what is this no idea