Pearson Edexcel International GCSE. Mathematics B PAPER 2R. 100% APPROVED predictor papers

Answer ALL ELEVEN questions. Write your answers in the spaces provided. You must write down all the stages in your working. 1 The functions f and g are defined as f(x) = 3x g(x) = 15 2 3 x − (a) Write down the val ...

Answer ALL ELEVEN questions. Write your answers in the spaces provided. You must write down all the stages in your working. 1 The functions f and g are defined as f(x) = 3x g(x) = 15 2 3 x − (a) Write down the value of x for which f(x) = 81 (1) (b) Write down the value of x that must be excluded from any domain of g (1) (c) Find fg(4) (2) .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. 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.................................................................................................................................................................................................................................................. https://britishstudentroom-b430a.web.app/*P68819A0336* Turn over 3 Question 1 continued .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. 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(Total for Question 1 is 4 marks) https://britishstudentroom-b430a.web.app/4 *P68819A0436* 2 (a) Find the set of values of x for which –2x – 4 < 3x + 6  21 – 2x (3) (b) Solve the inequality 4x2 – 8x < 21 (3) (c) Hence represent on the number line on the opposite page, the set of values of x for which –2x – 4 < 3x + 6  21 – 2x and 4x2 – 8x < 21 (2) .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. 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.................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. https://britishstudentroom-b430a.web.app/*P68819A0536* Turn over 5 Question 2 continued –5 –4 –3 –2 –1 0 1 2 3 4 5