Answer
See below.
Work Step by Step
A closed function is a function that can be represented as a SINGLE formula, which may be a combination of:
- constants,
- powers of x,
- exponential functions,
- radicals,
- logarithms,
- trigonometric functions,
- other functions not discussed in the book
We combine by means of usual arithmetic operations and compositions.
Such (closed) functions are CONTINUOUS on their domains.
Opposed to closed functions are functions defined as piecewise.
