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- "Algebraic formula" answer type
### "Algebraic formula" answer type

### Example

Use the

**algebraic formula**answer type to ask a question on the inverse of the function where and are integer constants.**Note:**The solution can be checked on Number Empire ↗.## Question settings

Note that the local algebraic variable y is set to y={10:100:1e-9};, i.e. values equal to or larger than 10 in order to avoid a possible (negative number)^(1/3) = NaN in the answer ((y-b)/a)^(1/3) where b ranges from 2 to 9. This is because, in PHP, negative bases with fractional exponents always return NaN. (See for example http://php.net/manual/en/function.pow.php ↗)

The Formulas question should look like this: