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Desiree4591 Desiree4591
  • 23-03-2016
  • Mathematics
Answered

find the given term 11, -33,99 9th term

Verified Answer :

konrad509
konrad509 konrad509
  • 23-03-2016

Assuming the sequence goes on like this 11,-33,99,-297,891,...,
its general formula is \(a_n=-11\cdot(-1)^n\cdot3^{n-1}\)

So, the 9th term is
\(a_9=-11\cdot(-1)^9\cdot3^{9-1}=-11\cdot(-1)\cdot6561=72171\)

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