Edexcel CP AS 2020 June — Question 8

Exam BoardEdexcel
ModuleCP AS (Core Pure AS)
Year2020
SessionJune
TopicProof by induction
  1. Prove by induction that, for \(n \in \mathbb { Z } ^ { + }\)
$$f ( n ) = 2 ^ { n + 2 } + 3 ^ { 2 n + 1 }$$ is divisible by 7
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