سوال ۱۸ کنکور ارشد ریاضی ۱۴۰۱

PASSAGE 1 (first paragraph):

"The interpolation problem for a function of a continuous argument, given discrete data, is closely related to the problem of constructing variational-difference schemes and continuous representations of solutions of difference problems. For as a rule, in order to obtain the difference equations, one has to discretize the operator and the solution of the problem by taking suitable projections. At the same time the solution of the differential problem usually represents an approximate solution of the original problem on a discrete set of points. ..."

Select the best choice for the meaning of the underlined word "argument" in the first paragraph.