Desiree4591
Desiree4591
23-03-2016
Mathematics
contestada
find the given term 11, -33,99 9th term
Respuesta :
konrad509
konrad509
23-03-2016
Assuming the sequence goes on like this 11,-33,99,-297,891,...,
its general formula is [tex]a_n=-11\cdot(-1)^n\cdot3^{n-1}[/tex]
So, the 9th term is
[tex]a_9=-11\cdot(-1)^9\cdot3^{9-1}=-11\cdot(-1)\cdot6561=72171[/tex]
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