Question

if a equals to 1 upon 3 b and b equals to 1 upon 2 C then A is to be is to see equals to

Answer 1

a=1/3b
b= 1/2c
a: b =?
solve it ratio method
a: b: c
1: 3.
... 1: 2
solve it
1: 3: 3
1: 1: 2
--------
1: 3: 6
so a: b:c= 1: 3: 6
hope this help u

Answer 2

Let 2^a=3^b=6^c =k 

2 = k^(1/a), 3 = k^(1/b) and 6= k^(1/c) 

2*3=6 
k^(1/a)*k^(1/b) = k^(1/c) 

k^(1/a +a/b)= k^(1/c) 

1/a +a/b = 1/c 

a+b/ab = 1/c 

c= ab/a+b Hence, Proved.