(Q16).Logarithmic form of
1
257
 = 4a .

What is Logarithmic form?

The logarithmic form is written as log
c
a
 = b. It is a rearrangement of the exponential form, ab = c. Any exponential equation can be written as a logarithm.
1
257
 = 4a .

(257)-1 = 4a

Here
1
257
 can be written as -1

(257)-1 = 4a

b = a

a = 4

c = 257-1

Here a,b,c can be written as per the given formula

log
c
a
 = b
log
257-1
 = a
log
257-1
 = a
log
257-1
 = a