Proof: Distribute Half
Let's prove the following theorem:
(a ⋅ (1 / 2)) + (a ⋅ (1 / 2)) = a
Proof:
# | Claim | Reason |
---|---|---|
1 | (1 / 2) + (1 / 2) = 1 | (1 / 2) + (1 / 2) = 1 |
2 | a ⋅ ((1 / 2) + (1 / 2)) = a ⋅ 1 | if (1 / 2) + (1 / 2) = 1, then a ⋅ ((1 / 2) + (1 / 2)) = a ⋅ 1 |
3 | a ⋅ 1 = a | a ⋅ 1 = a |
4 | a ⋅ ((1 / 2) + (1 / 2)) = a | if a ⋅ ((1 / 2) + (1 / 2)) = a ⋅ 1 and a ⋅ 1 = a, then a ⋅ ((1 / 2) + (1 / 2)) = a |
5 | (a ⋅ (1 / 2)) + (a ⋅ (1 / 2)) = a ⋅ ((1 / 2) + (1 / 2)) | (a ⋅ (1 / 2)) + (a ⋅ (1 / 2)) = a ⋅ ((1 / 2) + (1 / 2)) |
6 | (a ⋅ (1 / 2)) + (a ⋅ (1 / 2)) = a | if (a ⋅ (1 / 2)) + (a ⋅ (1 / 2)) = a ⋅ ((1 / 2) + (1 / 2)) and a ⋅ ((1 / 2) + (1 / 2)) = a, then (a ⋅ (1 / 2)) + (a ⋅ (1 / 2)) = a |
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