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numbers and algebraic expressions
logic, sets, intervals
absolute value
function and its properties
linear function
quadratic function
polynomials
rational function
exponential function
logarithm
number sequences
limits of sequences and functions
derivative and integral of functions
trigonometry
plane geometry
analytic geometry
solid geometry
combinatorics
probability
elements of statistics
kropki game

Argument of a function is number, which can be put to formula of a function. Value of a function is number, which can be obtain from formula of a function. Example. Not allowed divide by 0. Numbers 0, 1 are arguments of a function f. Number 2 are not argument of a function f, because when put 2 to formula of function f then obtain expression without any sense (divide by zero}). Numbers -2, -4 1/2 are values of a function f.