The negative square-root branch
The negative square-root branch
5 marks
TGM Original
Let f(x)=5-2(x+1)2, x <= -1. Find f-1, stating its domain and range.
Solution:
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Answer:\(-1-\sqrt{\dfrac{5-x}{2}}\), \(D=(-\infty,5]\), \(R=(-\infty,-1]\).
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