Hello!

a) f(g(x))=g(x)-1/2=2x-3/2,

g(f(x))=2f(x)-1=2x-2.

is not = x, so isn't inverse.

b) f(g(x))=-3/g(x)=-x,

g(f(x))=3/f(x)=-x.

Also is not=x, so isn't inverse.

question was incorrect first was x-1

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