What happens to output when all inputs are increased proportionally in a production function with constant returns to scale?

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Increasing all inputs by a factor of two results in output increasing by more than twice due to acceleration effects.Doubling every input leaves the output unchanged since output remains fixed.Doubling all inputs causes output to increase by less than double because of diminishing productivity.Doubling all inputs leads to exactly double the output.

Explanation

With constant returns to scale, scaling all inputs by a certain factor results in output increasing by the same factor. Therefore, doubling inputs will precisely double the output.