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The increasing sequence of positive integers a_1, a_2, a_3,... has the property that

a_{n+2} = a_{n+1}+a_{n}
for all n≥1. If a_7 = 120, then find a_8.

 Sep 1, 2021
 #1
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By using the recursion, $a_8 = 128$.

 Sep 1, 2021
 #2
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Incorrect. The reccursion does not give you that result :P.

 Sep 1, 2021

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