The property that must be used in all the proofs is: logb(b^y) =y
The proofs are statements that are used to validate or invalidate a logarithmic expression
There are several proofs of logarithms; some of them are:
The common property in the first three proofs (listed above) is:
[tex]\log_b(b^y) =y[/tex]
This is so because, it links all the three proofs
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