Jawaban:
17
Penjelasan dengan langkah-langkah:
f(x) = x² - 6x + 5
y = x² - 6x + 5
y + 4 = x² - 6x + 5 + 4
y + 4 = x² - 6x + 9
y + 4 = (x - 3)²
x - 3 = √(y + 4)
x = 3 + √(y + 4)
f^-1 (x) = 3 + √(x + 4)
f^-1 (21) + f^-1 (32)
= 3 + √(21 + 4) + 3 + √(32 + 4)
= 6 + √(25) + √(36)
= 6 + 5 + 6
= 17
Kelas 11
Pelajaran Matematika
Bab Fungsi
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Jawaban:
17
Penjelasan dengan langkah-langkah:
f(x) = x² - 6x + 5
y = x² - 6x + 5
y + 4 = x² - 6x + 5 + 4
y + 4 = x² - 6x + 9
y + 4 = (x - 3)²
x - 3 = √(y + 4)
x = 3 + √(y + 4)
f^-1 (x) = 3 + √(x + 4)
f^-1 (21) + f^-1 (32)
= 3 + √(21 + 4) + 3 + √(32 + 4)
= 6 + √(25) + √(36)
= 6 + 5 + 6
= 17
Kelas 11
Pelajaran Matematika
Bab Fungsi