Jawaban:

f(3x - 7) = 6x - 20

misal

• 3x - 7 = k
• 3x = k + 7
• x = (k + 7)/3

f(k) = 6(k + 7)/3 - 20

f(k) = 2(k + 7) - 20

f(k) = 2k - 6

f(x) = 2x - 6

Invers Fungsi

f(x) = 2x - 6

2x = f(x) + 6

x = (f(x) + 6)/2

.

f⁻¹(x) = (x + 6)/2

f⁻¹(x + 2) = (x + 2 + 6)/2

f⁻¹(x + 2) = (x + 8)/2

Kesimpulan

• Jadi, nilai f⁻¹(x + 2) adalah (x + 8)/2 [Opsi E]

Detail jawaban

♬ Mapel : Matematika

♬ Kelas : X

♬ Materi : Bab 3 – Fungsi

♬ Kode mapel : 2

♬ Kode kategorisasi : 10.2.3

♬ Kata kunci : invers fungsi, nilai f⁻¹(x + 2)

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