1. tentukan nilai dari ^2 log 48 - ^2 log 36 + ^2 log 12 2. Diket ^2 log 3 = a, ^2 log 5 = b. Tentukan nilai ^6 log 45 3. Tentukan nilai dari ^2 log 9 x ^3 log 16 x ^4 log 32 4. Rasionalkan penyebut 3 per √5 + √2 5. Diket rumus fungsi f(x) = ax+b Jika f(1) = 8, f(2) = 1 Tentukan a. a = ... b. b = ... c. f (x) = ...
= ²log (48 : 36 x 12)
= ²log 16
= ²log 2⁴
= 4
2. ²log 3 = a dan ²log 5 = b
6 log 45
=
=
=
3. ²log 9 x ³log 16 x ⁴log 32
= ²log 3² x ³log 4² x ⁴log 2⁵
= ²log 3 x ³log 4 x ⁴log 2 x 2 x 2 x 5
= ²log 2 x 20
= 1 x 20
= 20
4.
= x
=
=
=
5. f(x) = ax + b
8 = a + b --> a = 8-b
1 = 2a + b
1 = 2 (8-b) + b
1 = 16 - 2b + b
b = 15
a = 8-15
a = -7
f (x) = -7x + 15
2.∧6log45=²log45/²log6=b+2a/1+a
3.²log3²x³log4²x=5
4.3 per √5+√2=3√5-3√2 per 5-2=√5-√2
5.a+b=8
2a+b=1
a=-7
b=15