invers kelas 10, matematika wajib.
Jawaban:
1. f(x) = x² - 5
y = x² - 5
x² = y + 5
x = √y + 5
[tex]f {}^{ - 1}(x) = \sqrt{x + 5} [/tex]
2. f(x) = x² - 6x + 1
y = x² - 6x + 9 - 9 + 15
y = (x - 3)² + 6
y - 6 = (x - 3)²
x - 3 = ± √y - 6
x = 3 ± √y - 6
[tex]f {}^{ - 1}(x) = 3 \frac{ + }{} \sqrt{x - 6} [/tex]
[answer.2.content]
