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Mapel : MatematikaKelas : X SMA
Bab : Fungsi Komposisi dan Fungsi Invers
Pembahasan :
f(x) = (2x + 3)/(4x - 1)
y = (2x + 3)/(4x - 1)
4xy - y = 2x + 3
4xy - 2x = y + 3
x(4y - 2) = y + 3
x = (y + 3)/(4y - 2)
f¯¹(x) = (x + 3)/(4x - 2)
f¯¹(5) = (5 + 3)/(4.5 - 2)
f¯¹(5) = 8/18
f¯¹(5) = 4/9