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| "use strict";
|
| var log = Math.log, sqrt = Math.sqrt;
|
| module.exports = function (value) {
| if (isNaN(value)) return NaN;
| value = Number(value);
| if (value < 1) return NaN;
| if (value === 1) return 0;
| if (value === Infinity) return value;
| return log(value + sqrt(value * value - 1));
| };
|
|
