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y = (2x+3)/(3x-1)
y (3x-1) = (2x+3)
3xy-y = 2x+3
3xy-2x = y+3
x(3y-2) = y+3
x = (y+3)/(3y-2)
f⁻¹(y) = (y+3)/(3y-2)
shg
f⁻¹(x) = (x+3)/(3x-2)
untuk nomor 10 kerjakan dengan cara yang sama