If the nth term of a series is defined by $U_n = 2U_{n-1} + U_{n-2}$, and the first two terms are 1 and 3, find the sum of the next five terms.
University of Ilorin MTH101 ester past question
- 3 + 9 + 21 + 51 + 123
- 3 + 7 + 17 + 41 + 99
- 3 + 8 + 19 + 46 + 111
- 3 + 10 + 23 + 56 + 135
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