
BILANGAN LOGARITMA X
Presentation
•
Mathematics
•
11th Grade
•
Medium
ACHMAD MUJAHID
Used 24+ times
FREE Resource
14 Slides • 10 Questions
1
LOGARITMA
BY ACHMAD MUJAHID
2
DOA
SILAHKAN BERDOA TERLEBIH DAHULU SEBELUM DIMULAI PEMBELAJARAN
3
TUJUAN
Siswa mampu menerapkan sifat-sifat logaritma dalam berbagai operasi perhitungan.
Siswa dapat menyelesaikan persamaan logaritma sederhana dan yang melibatkan sifat-sifat logaritma.
4
Logaritma adalah suatu invers atau
kebalikan dari pemangkatan
(eksponen) yang digunakan untuk
menentukan besar pangkat dari suatu
bilangan pokok.
LOGARITMA
5
6
Sifat-sifat
Logaritma
7
Penerapan sifat logaritma
8
9
1). 2 log 25 – 3 log 5 + log 20
Jawab
2 log 25 – 3 log 5 + log 20
= log 252 – log 53 + log 20
= log (252/53) + log 20
= log 5 + log 20
= log (5 × 20)
= log 100 = 2
2). ½ 2log 82 – 3 2log 3 + 2log 48
Jawab
½ 2log 82 – 3 2log 3 + 2log 48
= 2log 82½ – 2log 33 + 2log 48
= 2log (9/27) + 2log 48
= 2log 1/3 + 2log 48
= 2log (1/3 × 48)
= 2log 16 = 4
Contoh :
10
2log 5 . 5log 64
2log 25 . 5log 3 . 3log 32
Jawab
2log 5 . 5log 64 = 2log 64 = 2log 26 = 6
2log 25 . 5log 3 . 3log 32
= 2log 52 . 5log 3 . 3log 25
= 2. 2log 5 . 5log 3 . 5. 3log 2
= (2 × 5) . 2log 5 . 5log 3 . 3log 2
= 10 . 2log 2
= 10 × 1 = 10
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12
Pembahasan
13
Multiple Choice
²log 8 = ....
3
4
5
6
7
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Multiple Choice
²log 2 . 8 = ....
-4
-2
2
4
-16
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Multiple Choice
3log18+ 3log45−3log10 =...
2
4
9
18
81
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Multiple Choice
²log 9.³log 2
2
3
4
5
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Multiple Choice
Diketahui log 2 = m dan log 5 = n. nilai log 10 = ....
mn
m+n
m:n
m-n
m2n
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Multiple Choice
Nilai dari 5log50+5log30−5log12+2log64
-5
9
4
5
19
SAATNYA REFLEKSI ...
YOOOOOOOOO
20
Multiple Choice
Setelah mempelajari logaritma, bagaimana perasaan Anda terhadap materi ini?
Saya merasa sangat yakin dan bisa menguasai semua soal.
Saya cukup mengerti, tetapi masih ada beberapa konsep yang membingungkan.
Saya kesulitan memahami materi ini secara keseluruhan.
Saya merasa materi ini tidak relevan dengan kehidupan sehari-hari.
21
Poll
Saya mendengarkan dan menyimak guruku dengan saksama.
Selalu
Kadang-kadang
Tidak pernah
Pura-pura memperhatikan
22
Poll
Apakah ananda merasa waktu pembelajaran sudah efektif?
YA
TIDAK
23
Poll
Perasaan saya selama kegiatan pembelajaran
SENANG
SEDIH
MENGANTUK
BINGUNG
24
SEMOGA BERMANFAAT ...
TERIMA KASIH .............
LOGARITMA
BY ACHMAD MUJAHID
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