# 3Tvwo §9.5 Power functions

§9.5 Power functions
This paragraph and the next
-  §9.6 Calculating with powers -
However, this LessonUp is only about §9.5.
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Slide 1: Slide
WiskundeMiddelbare schoolvwoLeerjaar 3

This lesson contains 16 slides, with interactive quiz and text slides.

Lesson duration is: 50 min

## Items in this lesson

§9.5 Power functions
This paragraph and the next
-  §9.6 Calculating with powers -
However, this LessonUp is only about §9.5.

#### Slide 1 -Slide

Task 1: Imagine what the graph for function f looks like.
So try to see it as clearly as possible, in your head!
Compare to the next slide.
f(x)=x2

#### Slide 2 -Slide

Solution 1:
This is it! Remember?
A parabola.
It is symmetrical around the y axis.

#### Slide 3 -Slide

Now we have the formula:

g(x)=x3
g(4)=....
g(4)=....

g(4)=.....
g(3)=......
g(x)=x3
and
g(4) = .....

#### Slide 5 -Mind map

Solution 2:
=  -4 x -4 x -4 = - 64
=    4 x 4 x 4 = 64
g(x)=x3
g(4)=....
g(4)=....

#### Slide 6 -Slide

Imagine what the graph for:
looks like.
Answer is in the next slide.
g(x)=x3

h(x)=x4
h(2)
h(2)

#### Slide 10 -Slide

Solution 4.  Given the function:
= -2 x -2 x -2 x -2 = 16    and
= 2 x 2 x 2 x 2 = 16  too!

h(x)=x4
h(2)
h(2)

#### Slide 11 -Slide

Once more:
imagine what shape the graph for
has!
Solution next slide.
h(x)=x4

#### Slide 13 -Slide

In the next slide ....
the previous content is summarized by a
'Theory'.

#### Slide 15 -Slide

Homework time.
Work on §9.5 for 10 to 15 minutes.
SKIP p.70!
Then we continue with a LessonUp about
§9.6 CALCULATING WITH POWERS.