An equation in which the variable being solved for is not directly expressed but must be arrived at by manipulation of the expression. For example, in the equation2x + 3y = 0, x is an implicit function of y.隐函数:一种数学函数,其中变量不能直接求解而表示成函数形式。例如,在等式2x + 3y = 0,x 是 y 的隐函数