good evening! Can someone please answer this, ill give you brainliest and your earning 50 points. Would be very appreciated.

See off side word is used it will be deducted half each time n is used
So we get a geometric sequence.
So correct formula is
[tex]\\ \rm\longmapsto f(n)=128(1/2)^n,n>1[/tex]
Option A is correct