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Kelas 10 MatematikaBab Fungsi Komposisi
f(x) = 5x - 2
y = 5x - 2
y + 2 = 5x
x = (y + 2)/5
f⁻¹ (x) = (x + 2)/5
f⁻¹ (x) = 2
(x + 2)/5 = 2
x + 2 = 2 . 5
x = 10 - 2
x = 8