numbers and algebraic expressions
logic, sets, intervals
function and its properties
limits of sequences and functions
derivative and integral of functions
elements of statistics
Multiplicative inverse of number a is 1/a. Examples: 2 and 1/2, 3 and 1/3. Additive inverse of number a is -a. Also known as the opposite number. Examples: 2 and -2, 3 and -3, -4 and 4, -1 1/2 and 1 1/2.