Jawabanmu

2014-06-13T09:49:28+07:00
A.2^b = 2^20 + 2^13
a.2^b = 2^13( 2^7 +1 )
sehingga nilai a  = (2^7 + 1) dan nilai b = 13
a - b = 2^7 +1 - 13
= 128 +1 -13
= 116