Given:
a = 65 - 100n
Let's find the first five terms.
[tex]\begin{gathered} \text{First term:} \\ a_1=65-100(1)\text{ = 65-100=-35} \end{gathered}[/tex][tex]\begin{gathered} \text{Second term:} \\ a_2=65-100(2)=65-200=-135 \end{gathered}[/tex][tex]\begin{gathered} \text{Third term:} \\ a_3=65-100(3)\text{ = 65 - 300 = }-235 \end{gathered}[/tex][tex]\begin{gathered} \text{Fourth term:} \\ a_4=65-100(4)\text{ = 65-400=-335} \end{gathered}[/tex][tex]\begin{gathered} \text{Fifth term:} \\ a_5=65-100(5)=65-500=-435 \end{gathered}[/tex]For a39, we have:
[tex]a_{39}=65-100(39)=65\text{ - 3900=}-3835[/tex]ANSWER:
First term = -35
Second term = -135
Third term = -235
Fourth term = -335
Fifth term = -435
39th term = -3835
