If , where , then is equal…
MATHEMATICS · Single correct · A Level · Mathematics · Algebra and Functions · Algebra and Functions
Problem
If f(x)=x+52x−1, where x=−5, then f−1(x) is equal to
(a) 2x−1x+5, x=21
(b) 2−x5x+1, x=2
(c) 2−x5x−1, x=2
(d) 2x+1x−5, x=21
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