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What is a zero point in mathematics?
Mathematically,

The zero point of the function is the value of the corresponding independent variable x when f(x)=0. It should be noted that the zero point is a numerical value, not a point, but the abscissa of the intersection of the function and the X axis. Generally speaking, for the function y=f(x)(x∈R), we call the real root x of the equation f(x)=0 as the zero point of the function y=f(x)(x∈R).