In 1738, Daniel, trying to solve a problem in probability theory and the theory of gambling by use of the calculus, stumbled on the concept of the law of diminishing marginal utility of money.
在1738年，丹尼尔试图用微积分来解决一个概率论和赌博理论里的问题，无意间却发现了货币的边际效用递减法则的概念。
Familiarity with multivariable calculus, linear algebra, and probability and statistics is required.
熟悉多变量微积分，线性代数，概率和统计是必需的。
College: Differential and Integral Calculus, Differential Equations, Linear Algebra, Probability and Statistics, Discrete Math.
大学：微积分，微分公式，线性代数，概率和统计，离散数学。
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