Question

Jika diketahui log 3 = a dan log 7 = b . nyatakan logaritme berikut dalam a dan b
a. ^3log 21
b. ^7log 81
c. ^21log 63
d. ^49log 189

Answer 1

A. b.a/a
b. 4a/b
c. b.2a/b.a
d. b.a.2a/2b

rasanya itu ya
klok bener

Answer 2

Log 3= a
log 7= b
maka :
a. ^3 log21 = log 21 / log 3 = log7.3 / log 3 =log 7 + log 3/ log 3 = b+a/a
b.^7 log 81 = log 7/ log 81= log 7/ log 3^4 = log 7/ 4.log 3= b/4.a= b/4a
c. ^21 log 63 = log7.3 / log7.3.3 = log 7+log3/log7+log3+log3 = b+a / b+a+a= b+a/b+2a
d.
^49 log 183= lo49/ log 18= log 7.7/ log7.27 = log 7+ log7/ log 7+ 3.log3 = b+b/ b+(3.a )= 2b/ b+3a

maaf klo acakacakan, smoga bisa membantu