1.a log (a) n = n (logarithmic identity)

Proof: let log(a) N=t, (t∈R)

Then there is a t = n.

a^(log(a)N)=a^t=N.

2. Logarithm (a)(M÷N)= Logarithm (a)M- Logarithm (a) N

M n = nlog (a meter