Proof: Converseofpowersubstitution

Let's prove the following theorem:

if bm = bn, then m = n

Proof:

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Given
1 bm = bn
Proof Table
# Claim Reason
1 logb(bm) = m logb(bm) = m
2 logb(bn) = n logb(bn) = n
3 logb(bm) = logb(bn) if bm = bn, then logb(bm) = logb(bn)
4 m = n if logb(bm) = logb(bn) and logb(bm) = m and logb(bn) = n, then m = n
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