
BARISAN DAN DERET
Presentation
•
Mathematics
•
10th Grade
•
Practice Problem
•
Hard
Ria Oktavia
Used 1+ times
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25 Slides • 0 Questions
1
Riswati, S.Si. & Ria Oktavia, S.Pd.
BARISAN
DAN DERET
2
Barisan dan Deret
Aritmatika
01
3
Barisan Aritmatika
Barisan Aritmatika adalah
barisan yang memiliki beda atau
selisih tetap antara dua suku
yang berurutan.
4
Pola Barisan Aritmatika
5
Barisan Aritmatika
Dengan :
𝑼𝒏
: suku ke – n
𝒂
: suku pertama
𝒏
: banyak suku
𝒃
: beda
𝑼𝒏 = 𝒂 + 𝒏 − 𝟏 𝒃
6
Contoh Barisan Aritmatika
7
Contoh Barisan Aritmatika
8
Suku Tengah Barisan Aritmatika
Dengan :
𝑼𝒕
: suku tengah barisan aritmatika
𝒂
: suku pertama
𝑼𝒏
: suku ke – n atau suku akhir
𝑼𝒕 =
𝟏
𝟐𝒂 + 𝑼𝒏
Suku tengah terdapat pada barisan aritmatika dengan
banyak suku ganjil
9
Contoh Suku Tengah Barisan Aritmatika
Diketahui barisan aritmatika
3, 7, 11, 15, . . . 203 .
a. Tentukan suku tengah barisan
tersebut.
b. Suku ke berapakah suku tengah
tersebut.
10
Jawab
a. Suku tengah barisan tersebut adalah
𝑈𝑡 =1
2𝑎 + 𝑈𝑛 = 1
23 + 203 = 103
b. Berdasarkan rumus suku ke –n
𝑈𝑛 = 𝑎 + 𝑛 − 1 𝑏
103 = 3 + 𝑛 − 1 4
103 = 3 + 4𝑛 − 4
103 + 1 = 4𝑛
104 = 4𝑛
𝑛 = 26
11
Sisipan Barisan Aritmatika
Dengan :
𝒃
: beda
𝒂
: suku pertama
𝑼𝒏
: suku terakhir
𝑠
: sisipan
𝒃 = 𝑼𝒏 − 𝒂
𝒔 + 𝟏
Jika suatu barisan aritmatika terdiri atas 𝒏 suku
barisan dan masing-masing suku barisan disisipkan 𝒔
suku sehingga terbentuk barisan aritmatika baru.
12
Contoh Sisipan Barisan Aritmatika
13
Deret Aritmatika
Dengan :
𝑺𝒏
: jumlah suku pertamake – n
𝒂
: suku pertama
𝒏
: banyak suku
𝒃
: beda
𝑺𝒏 =
𝒏
𝟐(𝟐𝒂 + 𝒏 − 𝟏 𝒃)
14
Contoh DeretAritmatika
15
Jawab
16
LATIHAN !!!
1.
Diketahui barisan aritmatika : 4, 1, -2, -5, …. Suku ke-
10 barisan tersebut adalah ….
2.
Diketahui suatu barisan aritmatika dengan suku ke-4
= 17 dan suku ke-9 = 37. Suku ke- 7 barisan tersebut
adalah ….
3.
Diketahui deret aritmatika dengan suku ke-3 = 24
dan suku ke-6 = 36. Jumlah 15 suku pertama deret
tersebut adalah . . .
17
Venus has a beautiful name and is the
second planet from the Sun. It’s terribly
hot—even hotter than Mercury
Introduction
18
Mercury is the closest planet to
the Sun and the smallest one in the
Solar System—it’s only a bit larger
than the Moon
Web Resources
19
Images reveal large amounts of
data, so remember: use an image
instead of long texts
A Picture
Always
Reinforces
the Concept
20
Mercury is the closest planet to the Sun
and the smallest one in the Solar
System—it’s a bit larger than the Moon
What Is This
Topic About?
21
Did You Know
This?
Despite being red, Mars is
actually a cold place
Mercury is the closest
planet and the smallest one
Jupiter is the biggest planet
in the Solar System
22
This Is a Graph
To modify this graph, click on it, follow the link,
change the data and paste the new graph here
Venus is the second
planet from the Sun
Venus
Despite being red,
Mars is a cold place
Mars
A
B
C
D
70
45
40
80
23
A Picture Is Worth
a Thousand Words
24
Problem
Venus has a
beautiful name and
is the second planet
from the Sun
Solution
Despite being red,
Mars is actually a
cold place. It’s full of
iron oxide dust
Problem and Solution
25
Process
Step 01
Step 03
Step 02
Step 04
Jupiter
Venus
Mars
Mercury
It’s the smallest
planet
Mars is a cold
place
It has a beautiful
name
It’s the biggest
planet
Riswati, S.Si. & Ria Oktavia, S.Pd.
BARISAN
DAN DERET
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