If 25 is to be divided in the ratio 2 : 3, then one part of the ratio will be _______.
If a line is divided into 2 parts with the lengths of larger one and smaller one as "a" and " b" respectively. Then ,
which of the following must be true to get the golden ratio 1.618 ?
a) a+ba=ba
b) a+ba=ab
c) ab+ba=ba
d) a+ba=aba