tolong jawab dong 3 soal logaritma ini pakai cara yang jelas ya

64][
4 . (1/2)'log t < (1/2)'log 81
t⁴ > 81
t > ⁴√81
t < -3 (tdk memenuhi) atau t > 3 (memenuhi)

Opsi : A

65][
b'log² x + 10 < 7 . b'log x
b'log² x - 7 . b'log x + 10 < 0
(b'log x - 2)(b'log x - 5) < 0

Pembuat nol :
b'log x - 2 = 0
b'log x = 2
x = b^2

b'log x - 5 = 0
b'log x = 5
x = b^5

Utk b > 1 , nilai x yg memenuhi :
b^2 < x < b^5

Opsi : C

66][
log (x² + 4x + 4) ≤ log (5x + 10)
x² + 4x + 4 ≤ 5x + 10
x² + 4x - 5x + 4 - 10 ≤ 0
x² - x - 6 ≤ 0
(x - 3)(x + 2) ≤ 0
-2 ≤ x ≤ 3 ... (1)

syarat numerus
x² + 4x + 4 > 0
(x + 2)² > 0
x e R , x ≠ -2 ... (2)

5x + 10 > 0
5x > -10
x > -2 ... (3)

NiLai x yg memenuhi :
Irisan (1) (2) dan (3)
-2 < x ≤ 3

Opsi : A

64.
4 × 1/2^log x < 1/2^log 81
1/2^log x^4 < 1/2^log 81
t^4 < 81
t < 4^√81
t < -3 atau t > 3 (A)

65. jawaban dilampiran gambar (C)

66.
log (x² + 4x + 4) ≤ log (5x + 10)
x² + 4x + 4 ≤ 5x + 10
x² + 4x - 5x + 4 - 10 ≤ 0
x² - x - 6 ≤ 0
(x - 3)(x + 2) ≤ 0
-2 ≤ x ≤ 3 ... (1)

x² + 4x + 4 > 0
(x + 2)² > 0
x e R , x ≠ -2 ... (2)

5x + 10 > 0
5x > -10
x > -2 ... (3)

-2 < x ≤ 3 (A)

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