例句與造句

1. :Dirac needed a modified definition for the derivative of the logarithm and he chose to violate the mathematical rule for this by inventing the Dirac Delta function, which isn't a bona fide function.
2. According to Ord, Pearson devised the underlying form of Equation ( 1 ) on the basis of, firstly, the formula for the derivative of the logarithm of the density function of the normal distribution ( which gives a linear function ) and, secondly, from a recurrence relation for values in the probability mass function of the hypergeometric distribution ( which yields the linear-divided-by-quadratic structure ).
3. It's difficult to find derivative of the logarithm in a sentence. 用derivative of the logarithm造句挺難的