Mathematics for IGCSE & O level - Functions (Section 1 - No. 33) | ExamPlay

Mathematics for IGCSE & O level - Functions (Section 1 - No. 33)

If f(x)= x/2+1, what is f^-1(x)?

2x-2

2x+2

x/2-1

x/2-2

解释

x=y/2+1 => x-1 = y/2 => y = 2x-2

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