#### Sequence of triangles 2

Determine a term that can be used for each step to determine the number of small triangles from which each figure is built.

# Terms with variables

Modeling
8

#### Sequence of squares 2

Determine a term that can be used for each step to determine the number of small squares from which each figure is built.

# Terms with variables

Modeling
6

#### Zero-point 1

$f(x) = (x - d)^2$, $d$ is a real number. Cross the right answer. The graph of the function has one zero-point for...

Reasoning
9

#### Zero-point 2

$f(x) = x^2 + e$, $e$ is a real number. Cross the right answer. The graph of the function has two zero-point for...

Reasoning
9

#### Vertex of the graph

Give the coordinates of the vertex S of the graph of f(x) = x² + 2x + 2.