The function is considered only for

MATHEMATICS · Single correct · A Level · Mathematics · Algebra and Functions · Algebra and Functions

Problem

The function g(x)=x2−4x+5g(x)=x^{2}-4x+5 is considered only for x≥2x\ge 2. Evaluate g−1(9)g^{-1}(9). (a) 2−222-2\sqrt{2} (b) 2+222+2\sqrt{2} (c) 55 (d) 4+224+2\sqrt{2}

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