Nội dung text Alternative Mock SAC #1 - LETQ (Tech-free) solutions_vF.pdf
Alternative Mock SAC #1 - LETQ (Tech-Free) Correct shape (1 mark) Correctly labelled intercepts (1 mark) Correctly labelled asymptotes (1 mark) (d) Show that the rule of the inverse function is f −1 (x) = − x −2 2x −6 . [2 marks] Solution: Swap x and y: x = 3− 1 2y +1 (1 mark) −x +3 = 1 2y +1 2y +1 = 1 −x +3 2y = − 1 x −3 −1 = − 1+ x −3 x −3 y = − x −2 2(x −3) = − x −2 2x −6 (1 mark) Mathematical Methods 3/4 © EdAtlas | Page 3 © EdAtlas
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