CASTI-89 TITANIUM · CALC89
exact(
Converts a decimal or approximate value into an exact rational form where possible. Use it to turn a decimal answer back into a fraction.
Syntax
exact(expr[, tol])
- Group
- Algebra
- Arguments
- Takes the expression and an optional tolerance for the rational approximation.
- Availability
- Included
Example
| Input | Result |
|---|---|
| exact(.25) | 1/4 |
Typing exact(.25) on the home screen and pressing ENTER returns 1/4.
Related commands
- expand(Multiplies out products and powers in an expression and returns a sum of terms.
- exp▶list(Extracts the values from a solution such as x=1 or x=2 and returns them as a list.
- factor(Factors an expression over the rational numbers, for example a polynomial into linear and irreducible quadratic factors.
- getDenom(Returns the denominator of a fraction after the expression has been reduced to a common denominator.
- getNum(Returns the numerator of a fraction after the expression has been reduced to a common denominator.
- left(Returns the left side of an equation or inequality.
- linSolve(Solves a system of linear equations and returns the values of the variables as a list.
- nSolve(Finds one real solution of an equation numerically.