[tex]\begin{gathered} The\text{ first five terms will obtain by putting n=1,2,3,4 and 5} \\ So,\text{ } \\ a_1=-7.1-2.1\times1=-9.2 \\ a_2=-7.1-2.1\times2=-11.3 \\ a_3=-7.1-2.1\times3=-13.4 \\ a_4=-7.1-2.1\times4=-15.5 \\ a_5=-7.1-2.1\times5=-17.6 \end{gathered}[/tex]
