Hints

Use these only after trying the exercises.

MATH-C01-C-001

Replace $x$ with 6. Multiply before subtracting.

The notation $g(5)$ means use 5 as the input. Replace every $t$ with 5.

The symbol $\in$ means "is in".

Mathematical indexing usually starts at 1 in this chapter.

Expand the sum first:

a_1 + a_2 + a_3

Read the summation first. Then read the factor $\frac{1}{n}$ .

The statement mixes two conventions. Use mathematical indexing for $x_2$ .

Check whether yes is listed as an element of $V$ .

Average means total divided by count.

A useful reading says what the formula does in context.

Next, compare your work with the explained solutions.