插值法利用函数f (x)在某区间中若干点的函数值，作出适当的特定函数，在这些点上取已知值，在区间的其他点上用这特定函数的值作为函数f (x)的近似值-Interpolation method using function f (x) in a certain interval in some point of function value, the appropriate specific function, in these points from the given value, in the interval of the other point in this particular function value as a function f (x) approximation