inverse of a figure

例句：

1. 1. The inverse of the equation is 2x + 3.
   这个方程的倒数是2x+3。
2. 2.The inverse of a square number is its reciprocal.
   一个平方数的倒数是它的倒数。
3. 3. The inverse function is the function that takes its own inverse as an argument.
   反函数是接受其自身逆函数作为参数的函数。