Proof: Multiplicative Identity 3
Let's prove the following theorem:
1 ⋅ a = a
Proof:
# | Claim | Reason |
---|---|---|
1 | a ⋅ 1 = a | a ⋅ 1 = a |
2 | 1 ⋅ a = a ⋅ 1 | 1 ⋅ a = a ⋅ 1 |
3 | 1 ⋅ a = a | if 1 ⋅ a = a ⋅ 1 and a ⋅ 1 = a, then 1 ⋅ a = a |
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