Proof: Remove One 2
Let's prove the following theorem:
if not (a = 0), then (1 / a) ⋅ (a ⋅ x) = x
Proof:
Given
1 | not (a = 0) |
---|
# | Claim | Reason |
---|---|---|
1 | ((1 / a) ⋅ a) ⋅ x = x | if not (a = 0), then ((1 / a) ⋅ a) ⋅ x = x |
2 | ((1 / a) ⋅ a) ⋅ x = (1 / a) ⋅ (a ⋅ x) | ((1 / a) ⋅ a) ⋅ x = (1 / a) ⋅ (a ⋅ x) |
3 | (1 / a) ⋅ (a ⋅ x) = x | if ((1 / a) ⋅ a) ⋅ x = (1 / a) ⋅ (a ⋅ x) and ((1 / a) ⋅ a) ⋅ x = x, then (1 / a) ⋅ (a ⋅ x) = x |
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