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Inverse Functions Question (1 Viewer)

Shuuya

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Could I get some help with (iii) please? :)


(This is Q7(a) from the 2002 3U HSC paper)

Thanks!
 

Paradoxica

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That's what I got, but I'm not sure which solution is correct...
Test a single point to determine which branch is the inverse.

i.e. if (a,b) is a point on the (restricted) function, plug in x = b and take the sign which yields f-1(x) = a
 

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