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Ubahlah ke dalam logaritma A. 3⁵ = 291 B. 2² = 128 C. 2-³ = ⅛ Tolong bantu jawab pakai cara​

Ubahlah ke dalam logaritma A. 3⁵ = 291 B. 2² = 128 C. 2-³ = ⅛ Tolong bantu jawab pakai cara​

Jawab:
A.  ³log291 = 5
B.  ²log128 = 2
C.  ²log(⅛) = -3

Penjelasan :

Properti logaritma
aᵇ = c,  maka   ᵃlog(c) = b

A.  Misalnya
3⁵ = 291,  maka  ³log291 = 5
Padahal aslinya 3⁵ = 243,  ³log243 = 5

B.  Misalnya
2² = 128,  maka  ²log128 = 2
Padahal aslinya 2² = 4, ²log4 = 2

C.  Misalnya
2⁻³ = ⅛   maka  ²log(⅛) = -3 (benar)

 

 

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