CAIE P1 2021 March — Question 1

Exam BoardCAIE
ModuleP1 (Pure Mathematics 1)
Year2021
SessionMarch
TopicBinomial Theorem (positive integer n)
TypeStandard product of two binomials

1
  1. Find the first three terms in the expansion, in ascending powers of \(x\), of \(( 1 + x ) ^ { 5 }\).
  2. Find the first three terms in the expansion, in ascending powers of \(x\), of \(( 1 - 2 x ) ^ { 6 }\).
  3. Hence find the coefficient of \(x ^ { 2 }\) in the expansion of \(( 1 + x ) ^ { 5 } ( 1 - 2 x ) ^ { 6 }\).