Proof: Multiply by 0
Let's prove the following theorem:
0 ⋅ a = 0
Proof:
| # | Claim | Reason |
|---|---|---|
| 1 | a ⋅ 0 = 0 | a ⋅ 0 = 0 |
| 2 | a ⋅ 0 = 0 ⋅ a | a ⋅ 0 = 0 ⋅ a |
| 3 | 0 ⋅ a = 0 | if a ⋅ 0 = 0 ⋅ a and a ⋅ 0 = 0, then 0 ⋅ a = 0 |
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