tolong bantuannya teman² , cara lengkap nya & kalau bisa sama materi nya. Terimakasih.

Fungsi dan Invers

f(x) = alog(bx+c) -> f-1(x) = (a^x - c) / b
f(x) = 3log(2x+4) -> f-1(x) = (3^x - 4) / 2
f-1(3) = (3^3 - 4) / 2 = 23/2 = 11 1/2 -> Jawab

Bab Logaritma
Matematika SMA Kelas X

f(x) = ³log (2x + 4) = y
2x + 4 = 3^y
2x = (3^y) - 4
x = ((3^y) - 4)/2
f⁻¹ (x) = (3ˣ - 4)/2

f⁻¹ (3) = (3³ - 4)/2
f⁻¹ (3) = (27 - 4)/2
f⁻¹ (3) = 23/2
f⁻¹ (3) = 11 1/2