Explain why the composite function is undefined at when and .

MATHEMATICS · Subjective · A Level · Mathematics · Algebra and Functions · Algebra and Functions

Problem

Explain why the composite function (g∘f)(x)(g\circ f)(x) is undefined at x=0x=0 when f(x)=xf(x)=\sqrt{x} and g(t)=1tg(t)=\dfrac{1}{t}.

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