# Mathematics Past Paper

Jul 8th, 2015
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1. If h(x) = 1 + 3x and k(x) = x +2( CXC 1999 # 5 ) evaluate: a) hk (x) b) hk(4) c) (hk)-1 (x)5 marks 2. Given that : f : x 3 – x and g: x x + 2 x – 5 a) Calculate g(2) b) State the value of x for which g(x) is NOT defined c) Derive an expression for gf(x) d) Calculate the value of f-1 (4)

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Mathematics Past Paperby franarexic Extra Class In MathematicsPractice Paper #2September 2, 20101. If h(x) = 1 + 3x and k(x) = x +2( CXC 1999 # 5 ) evaluate:a) hk (x)b) hk(4)c) (hk)-1 (x)5 marks2. Given that :f : x 3 x andg: x x + 2x 5a) Calculate g(2)b) State the value of x for which g(x) is NOT definedc) Derive an expression for gf(x)d) Calculate the value of f-1 (4)e) Derive an expression for g-1 (x) 12 marks ( CXC 2000 #5 )3. Given that f(x) = x2 and g(x) = 5x + 3Calculate :a) f(-2)b) gf(-2)c) g-1(x) 7 marks (CXC 1998 # 6)4. Given that f(x) = 2x2 + 2

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