1. Jika a²log b + b²log a = 1 tentukan nilai a + b 2. jika 16log 27 = a tentukan 9log 2 3. Jika 8log 5 = x maka 5log 4 ... 4. Jika x+ylog 2 = a tentukan 4log(
Matematika
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Pertanyaan
1. Jika a²log b + b²log a = 1 tentukan nilai a + b
2. jika 16log 27 = a tentukan 9log 2
3. Jika 8log 5 = x maka 5log 4 ...
4. Jika x+ylog 2 = a tentukan 4log(x²-y²)
x-ylog 8 = b
5. Tentukan nilai (4log 3) (4log6) / (4log9) (8log2) + (4log9) (8log3)
6. Jika log (a²/b²) = 18 tentuka log (5. ∛8b/a)
7. jika ³log 8 = x dan ³log 25 = y tentukan ³log 15 . ∛16
Tolong ya dengan caranya juga
2. jika 16log 27 = a tentukan 9log 2
3. Jika 8log 5 = x maka 5log 4 ...
4. Jika x+ylog 2 = a tentukan 4log(x²-y²)
x-ylog 8 = b
5. Tentukan nilai (4log 3) (4log6) / (4log9) (8log2) + (4log9) (8log3)
6. Jika log (a²/b²) = 18 tentuka log (5. ∛8b/a)
7. jika ³log 8 = x dan ³log 25 = y tentukan ³log 15 . ∛16
Tolong ya dengan caranya juga
1 Jawaban
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1. Jawaban WeiFuk
1. a x ² log b + b x ² log a = 1, ² log b^a + ² log a^b = 1, ² log b^a x a^b = 1, 2^1 = b^a x a^b, b^a x a^b = 2 , a = 2, b = -2, a + b = 0
2. 16 log 27 = a, 27 log 16 = 1/a, 3^3 log 2^4 = 1/a , 4/3 x 3 log 2 = 1/a, 3 log 2 = 3 / 4a, 9 log 2, 3^2 log 2, 2 x 3 log 2, 2 x 3/4a = 6/4a
3. 5 log 8 = x, 5 log 2^3 = x, 3 x 5 log 2 = x, x /3 = 5 log 2, 5 log 4 = 5 log 2^2, 2 x x/3 = 2x /3
4. x+y log 2 = a, x-y log 8 = b, 2 log x +y = 1/a, 2 log x - y = 3/b, 4 log x^2 - y^2 = 2^2 log (x-y)(x+y) = 1/2 ( 2 log x+ y + 2 log x - y ) = 1/2 ( 1/a + 3/b ) = 1/2 ( b + 3a / ab ) = b + 3a / 2ab
5. Maaf gak ngerti
6. Maaf gak ngerti
7. 3 log 8 = x, 3 log 2 = x/3 , 3 log 25 = y, 3 log 5 = y/2, 3 log 15 x 2^4/3 = 3 log 15 + 3 log 2^4/3, ( 3 log 5 + 3 log 3 ) + 4 / 3 x 3 log 2 = (y/2 + 1) + 3x / 12 = y + 2 /2 + 3 x /12 = 6 y + 12 + 3x /12