Question

12.3 Write the first five terms of the sequence whose general term is 2B4" id="TexFormula1" title="a_{n}=3^{n}+4" alt="a_{n}=3^{n}+4" align="absmiddle" class="latex-formula"> .

Answer 1

Answer:

7,13,31,85,247......

Step-by-step explanation:

$a_n =3^n + 4$

        $\sf a_1=3^1 + 4 = 3 + 4 = 7\\\\a_2 = 3^2 + 4 = 9 + 4 = 13\\\\a_3 = 3^3 + 4 = 27 + 4 = 31\\\\a_4 = 3^4 + 4 = 81 + 4 = 85\\\\a_5 = 3^5 + 4 = 243 + 4 = 247$