155.对数运算The limit of 1 over the absolute value of x as x approaches zero is infinity.
相关符号: log, ln
相关词汇: logarithm operation 对数运算、base 底、common logarithm 常用对数(以10为底)、natural logarithm 自然对数(以自然数e=2.71818...为底)
口语表达:
读作 the logarithm of x to base b,通常口语里把logarithm简称log
166.求倒数lnx 读作 the natural log of x
相关词汇: reciprocal 倒数
口语表达: the reciprocal of 5 is one fifth (1/5) or zero point two (0.2).
177.求反函数相关符号: f -1
相关词汇: inverse Function 反函数
口语表达: y = f(x) = 2x 4 Function y equals f of x equals 2 x plus 4.
188.向量点乘Its inverse function f inverse as a function of y is equal to one half y minus 2, f -1(y) = y/2 - 2.
相关符号: .
相关词汇: dot product 点积,数量积、scalar product 标量积
口语表达:
199.向量叉乘读作 the dot product of vectors u and v
相关符号: ×
相关词汇: cros product 叉积、vector product 矢量积,向量积
口语表达:
2010.求积分读作 the cross product of vectors u and v
相关符号: