a) Expand (1 + 2x). b) Show that (1 + 2x) + (1 2x) = 2(1
Question:
a) Expand (1 + 2x)³.
b) Show that
(1 + 2x)³ + (1 − 2x)³ = 2(1 + 12x²).
c) Hence solve (1 + 2x)³ − (1 − 2x)³ = 8.
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ANSWER a Expanding 1 2x using the binomial theorem 1 2x ...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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