Tolong jelaskan tentang logaritma dan eksponen beserta contoh nya ? terima kasih :)
RiskyAlhamdhanSifat-sifat eksponen: Jika a dan b adalah bilangan real (a≠0 dan b≠0) serta m dan n adalah bilangan rasional, maka:am . an = am+n Contoh: 23.24 = 23+4 am/an = am-n Contoh: 36/ 32 = 36-2 (am)n = amn Contoh: (22)2 = 22 x 2 = 24 = 16 (ab)n =anbn Contoh: (2.3)2= 22.32 = 4.9 =36 (a/b)n = (an/bn) Contoh: (6/2)2 = 62/22 = 36/4 = 9
a1 = a Contoh: 31 = 3 a0 = 1 Contoh: 50 = 1 Sifat-sifat Logaritma alog a = 1 alog 1 = 0 alog (c x d) = alog c + alog d contoh: 2log (8) = 2log (2 x 4) = 2log 2 + 2log 4 = 1 + 2 = 3 alog (c : d) = alog c - alog d contoh: 3log (9) = 3log (27 : 3) = 3log 27 - 3log 3 = 3 - 1 = 2 alog cd = d x (alog c) contoh: 2log 28 = 8 x (2log 2) = 8 x 1 = 8 (alog b)(blog c) = alog c contoh: (2log 65)(65log 8 ) = 2log 8 = 3 (alog b) : (alog c) = clog b contoh: (7log 64) : (7log 2) = 2log 64 = 6 aa log b = b contoh: 22 log 4 = 4 a log b = 1/blog a contoh: 2log 8 = 1/ 8 log 2. Selain itu, ada pula sifat logaritma yang seperti ini log x. Artinya adalah, log x = 10log x.
Jika a dan b adalah bilangan real (a≠0 dan b≠0) serta m dan n adalah bilangan rasional, maka:am . an = am+n
Contoh: 23.24 = 23+4
am/an = am-n
Contoh: 36/ 32 = 36-2
(am)n = amn
Contoh: (22)2 = 22 x 2 = 24 = 16
(ab)n =anbn
Contoh: (2.3)2= 22.32 = 4.9 =36
(a/b)n = (an/bn)
Contoh: (6/2)2 = 62/22 = 36/4 = 9
a1 = a
Contoh: 31 = 3
a0 = 1
Contoh: 50 = 1
Sifat-sifat Logaritma
alog a = 1
alog 1 = 0
alog (c x d) = alog c + alog d
contoh: 2log (8) = 2log (2 x 4) = 2log 2 + 2log 4 = 1 + 2 = 3
alog (c : d) = alog c - alog d
contoh: 3log (9) = 3log (27 : 3) = 3log 27 - 3log 3 = 3 - 1 = 2
alog cd = d x (alog c)
contoh: 2log 28 = 8 x (2log 2) = 8 x 1 = 8
(alog b)(blog c) = alog c
contoh: (2log 65)(65log 8 ) = 2log 8 = 3
(alog b) : (alog c) = clog b
contoh: (7log 64) : (7log 2) = 2log 64 = 6
aa log b = b
contoh: 22 log 4 = 4
a log b = 1/blog a
contoh: 2log 8 = 1/ 8 log 2.
Selain itu, ada pula sifat logaritma yang seperti ini log x.
Artinya adalah, log x = 10log x.