Given that f(x) = 3x 1, g(x) = x + 4 and fg(x) = gf(x), where
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Given that f(x) = 3x − 1, g(x) = x² + 4 and fg(x) = gf(x), where x ∈ R, show that x² − x − 1 = 0.
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ANSWER We know that fgx gfx so fgx fgx fx 4 3x 4 1 3x 11 a...View the full answer
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Related Book For 
Complete Pure Mathematics 1 For Cambridge International AS & A Level
ISBN: 9780198427438
2nd Edition
Authors: Jean Linsky, Brian Western, James Nicholson
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