
Persamaan Logaritma
Presentation
•
Mathematics
•
10th Grade
•
Practice Problem
•
Hard
Aries Kurniawati
Used 9+ times
FREE Resource
13 Slides • 2 Questions
1
by Aries Kurniawati, S.Pd
2
Peserta didik dapat mendeskripsikan fungsi logaritma, menentukan penyelesaian fungsi logaritma, menggunakan masalah kontekstual yang terkait dengan logaritma, dan menyajikan fungsi logaritma, serta menyelesaikan masalah yang berkaitan dengan fungsi logaritma
3
Bentuk alog f(x) = alog p
Contoh :
Tentukan Himpunan Penyelesaian dari 2log (x - 2) + 2log (x - 3) = 1!
Jawab :
Syarat x - 2 > 0
x - 3 > 0
4
Penyelesaian persamaan
5
Bentuk alog f(x) = blog f(x)
a
6
Coba kalian jawab soal pada slide berikutnya dengan benar ya
7
Multiple Choice
log (x-2) + log (x -7) = log 6.
Himpunan penyelesaian dari persamaan tersebut adalah ...
8
10
12
14
8
Fill in the Blanks
2log (x2 + 4x) = 5
Himpunan penyelesaian dari persamaan tersebut adalah
Type answer...
9
Bentuk alog f(x) = alog g(x)
10
Penyelesaian persamaan :
log (x - 1) + log (x - 2) = log ( 3x + 2)
11
Bentuk h(x)log f(x) = h(x)log g(x)
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Penyelesaian persamaan
2x - 5log (2x + 1) = 2x - 5log (x + 4)
2x + 1 = x + 4
2x - x = 4 - 1
x = 3
Substitusi x = 3 ke persamaan 2x - 5
x = 3
Karena syarat h(x)
Jadi penyelesaiannya adalah
13
Bentuk A(alog x)2 + B(alog x) + C = 0
Contoh
14
p = 1 atau p = 4
3log x = 1 atau 3log x = 4
3log x = 3log 3 atau 3log x = 3log 34
x = 3 atau x = 81
Jadi himpunan penyelesaiannya adalah 3 dan 81
15
by Aries Kurniawati, S.Pd
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