we have f(x)=(-5x+2)/(x+5)
so we take : x=(-5y+2)/(y-5) so : x(y-5) = -5y+2 so : xy - 5x = -5y + 2 so : xy + 5y = 5x + 2
so : y(x+5)=5x + 2 ====>>> y = (5x + 2)/(x + 5) so : f^-1(x) = (5x + 2)/(x + 5 )
So my answer was right then?
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