The nth term of a Sequence.
[tex]\begin{gathered} d=T_2-T_1=T_3-T_2 \\ d=-3.4-2.4\text{ =-9.2--3.4} \\ d=-5.8\text{ =-9.2+3.4} \\ d=-5.8=-5.8 \\ \text{This confirms the sequence to be an Arithmetical Sequence.} \end{gathered}[/tex]The general formula of Arithmetical Sequence is given by;
