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Any questions?

You can post mathematical symbols by clicking on the x/2
and on the $\sqrt{x}$ symbol on the bottom of the editing menu above, when you are in edit mode. The editing menu/screen looks like this: By clicking on the $\sqrt{x}$, you will be writing a new equation in a separate line, for example
[$] nCk=\frac{n!}{k!(n-k)!} [$].
Notice that the equation will then be numbered. Such equations are written between [$] and [$].

By clicking on the x/2, you will be writing a new equation in the same line, for example $nPk = \frac{n!}{(n-k)!}$.
Such equations are written between [[$and$]].

The mathematical symbols in between are written in Latex.

Here are some examples:

• To write fractions type *\frac{}{}*, for example:
• \frac{2}{3} is $\frac{2}{3}$
• \frac{2+x}{x-y} is $\frac{2+x}{x-y}$
• To write powers type ^:
• 3^2 is $3^2$
• {x^y}^z is ${x^y}^z$
• To write a square root, one types \sqrt{ }, for example
• \sqrt{64x^2}=8x is $\sqrt{64x^2}=8x$ assuming that $x\ge 0$ (typed x \ge 0 for the inequality).
• To write the sigma sign for sum, one types \sum, and if one wants to specify the limits of this sum, those are introduced with *_* (lower limit) and ^ (upper limit), for example:
• \sum\limits_{i=1}^{10}=1+2+3+…+9+10 = 5050 is $\sum\limits_{i=1}^{10}=1+2+3+...+9+10 = 5050$

There will be a thread for each homework. The idea is that students can post questions on a homework on the thread about certain problems. The title of the post should indicate the page, the problem and give enough information for another person to answer the question without having to look at the book.

Other students are encouraged to answer questions as this will count for participation, provided that the answers contribute to the discussion.

You can post mathematical symbols by clicking on the $x/2$
and on the $\sqrt{x}$ symbol on the bottom of the menu above.

By clicking on the $\sqrt{x}$, you will be writing a new equation in a separate line, for example
[$] nCk=\frac{n!}{k!(n-k)!} [$].
Notice that the equation will then be numbered. Such equations are written between [$] and [$].

By clicking on the *x/2*, you will be writing a new equation in the same line, for example $nPk = \frac{n!}{(n-k)!}$.
Such equations are written between [[$and$]].

The mathematical symbols in between are written in Latex.

Here are some examples:

• To write fractions type *\frac{}{}*, for example:
• \frac{2}{3} is $\frac{2}{3}$
• \frac{2+x}{x-y} is $\frac{2+x}{x-y}$
• To write powers type ^:
• 3^2 is $3^2$
• {x^y}^z is ${x^y}^z$
• To write a square root, on types \sqrt{ }, for example
• \sqrt{64x^2}=8x is $\sqrt{64x^2}=8x$
• To write the sigma sign for sum, one types \sum, and if one wants to specify the limits of this sum, those are introduced with *_* (lower limit) and ^ (upper limit), for example:
• \sum\limits_{i=1}^{10}=1+2+3+…+9+10 = 5050 is $\sum\limits_{i=1}^{10}=1+2+3+...+9+10 = 5050$