Prelims Revision Set: Reciprocal and Gradient Graphs Q3

Prelims Revision Set: Reciprocal and Gradient Graphs Q3

TGM Original Questions

\(y=\mathrm{f}\left( x \right)\)

\(y=\frac{1}{\mathrm{f}\left( x \right)}\)

\(y=\mathrm{f}'\left( x \right)\)

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Answer:For \(y=\dfrac1{f(x)}\): open limiting points \((-1,0)\), \((1,0)\), and maximum \((0,1)\). For \(y=f'(x)\): vertical asymptotes \(x=-1,1\), horizontal asymptote \(y=0\), zero \((0,0)\), negative for \(x<0\) and positive for \(x>0\), wherever defined.

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