Sifat-sifat logaritma
Click here to load reader
-
Upload
ruth-girsang -
Category
Presentations & Public Speaking
-
view
113 -
download
2
description
Transcript of Sifat-sifat logaritma
![Page 1: Sifat-sifat logaritma](https://reader038.fdokumen.com/reader038/viewer/2022100507/559c94cc1a28ab54298b4580/html5/thumbnails/1.jpg)
![Page 2: Sifat-sifat logaritma](https://reader038.fdokumen.com/reader038/viewer/2022100507/559c94cc1a28ab54298b4580/html5/thumbnails/2.jpg)
Logaritma adalah operasi matematika yang merupakan kebalikandari eksponen atau pemangkatan.
Rumus dasar logaritma: bc= a ditulissebagai blog a = c (b disebut basis)
ac = b → ª log b = c
ket : a = basisb = bilangan yang dilogaritmac = hasil logaritma
![Page 3: Sifat-sifat logaritma](https://reader038.fdokumen.com/reader038/viewer/2022100507/559c94cc1a28ab54298b4580/html5/thumbnails/3.jpg)
Sifat – Sifat Logaritma :1. plog ( ab ) = plog a + plog b2. alog an = n3. plog (a/b) = plog a – plog b4. plog 1 = 05. plog an = n . alog a6. plog a . alog q = plog q7. pnlog am = m/n plog a8. plog p = 1
![Page 4: Sifat-sifat logaritma](https://reader038.fdokumen.com/reader038/viewer/2022100507/559c94cc1a28ab54298b4580/html5/thumbnails/4.jpg)
CONTOHSOAL
![Page 5: Sifat-sifat logaritma](https://reader038.fdokumen.com/reader038/viewer/2022100507/559c94cc1a28ab54298b4580/html5/thumbnails/5.jpg)
1. Jika 2log x = 3Tentukan nilai x = ….
Jawab:2log x = 3
x = 23
x = 82. Nilai dari 3log (81 : 27) = ….
Jawab:= 3log 81 - 3log 27= 3log 34 - 3log 33
= 4 - 3= 1
![Page 6: Sifat-sifat logaritma](https://reader038.fdokumen.com/reader038/viewer/2022100507/559c94cc1a28ab54298b4580/html5/thumbnails/6.jpg)
3. Nilai dari 2log (8 x 16) = ….Jawab:
= 2log 8 + 2log 16= 2log 23 + 2log 24
= 3 + 4= 7
4. Nilai dari 2log 84 = ….Jawab:
= 2log 84
= 4 x 2log 23
= 4 x 3= 12
![Page 7: Sifat-sifat logaritma](https://reader038.fdokumen.com/reader038/viewer/2022100507/559c94cc1a28ab54298b4580/html5/thumbnails/7.jpg)
5. Jika log 100 = xJawab:
log 100 = x10x = 10010x = 102
x = 26. Nilai dari 2log 8 + 3log 9 = ….
Jawab:= 2log 8 + 3log 9= 2log 23 + 3log 32
= 3 + 2= 5
![Page 8: Sifat-sifat logaritma](https://reader038.fdokumen.com/reader038/viewer/2022100507/559c94cc1a28ab54298b4580/html5/thumbnails/8.jpg)