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| Some factorial and some power (Posted on 2024-03-26) |
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Find all possible non-negative integer solution (x,y) of the following equation
x! + 2y = (x+1)!
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 | Comment 4 of 5 | 
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So, the solution to the equation is <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>�</mi><mo>=</mo><mfrac><mi>�</mi><mn>2</mn></mfrac></mrow></semantics></math>y=2x.
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