Transformations of Graphs - Reciprocal Graph, \(y=\frac{1}{f(x)}\)

Transformations of Graphs - Reciprocal Graph, \(y=\frac{1}{f(x)}\)

Secondary 3

Given the original graphs, \(y=\mathrm{f}\left( x \right)\), sketch the reciprocal graph, \(y=\frac{1}{\mathrm{f}\left( x \right)}\), respectively.

\(y=\text{f}\hspace{0.1em}\left( x \right)\)

\(y=\frac{1}{\text{f}\hspace{0.1em}\left( x \right)}\)

Solution:

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Answer:Four reciprocal sketches shown. (1) Asymptotes \(x=0,y=0\). (2) Vertical asymptotes \(x=-3,1\), maximum \(\left(-1,-\frac25\right)\), intercept \(\left(0,-\frac12\right)\). (3) Vertical asymptotes \(x=-5,-1,2\), minimum \(\left(-3,\frac12\right)\), maximum \((0,-1)\). (4) Vertical asymptotes \(x=0,4\), maximum \(\left(2,-\frac13\right)\), left horizontal asymptote \(y=-\frac23\).

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