3.- Derivator - Extrempunkter (Envariabelanalys M)

Functional expressions are largely written as by hand. Functions must be written with parentheses: i.e. sin(x), not sin x.

Some special functions

• $\sqrt{x}$ is written sqrt(x)
• $e^x$ is written exp(x)
• $|x|$ is written abs(x)

Exponents are written using ^: e.g. $2^{x+y}$ is wrtten as 2^(x+y).

Place parentheses where needed: $\dfrac{x+y}{1+x}$ is written as (x+y)/(1+x)

Multiplication sign may but do not have to be explicitly written out: $x\cdot y$ may be written as xy or x*y.