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Let ltangt be the sequence defined by a1...

Let `lta_ngt` be the sequence defined by `a_1=3` and `a_n =3a_(n-1)+2` for all `n gt1`..Find `a_3`.

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`a_1=3` and `a_n=3a_(n-1)+2`
`therefore a_2=3a_1+2=3xx3+2=11`
`thereforea_3=3a_2+2=33+2=35`
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