Question

If $T_n=5-4n$, find the first three terms.

Answer 1

The given sequence is $t_n=5-4n$.

The first term $t_1$ can be determined by substituting $n=1$ in the sequence $t_n=5-4n$ as follows:

$t_1=5-(4\times 1)=5-4=1$

The second term $t_2$ can be determined by substituting $n=2$ in the sequence $t_n=5-4n$ as follows:

$t_2=5-(4\times 2)=5-8=-3$

The third term $t_3$ can be determined by substituting $n=3$ in the sequence $t_n=5-4n$ as follows:

$t_3=5-(4\times 3)=5-12=-7$

Hence, the first three terms are $1,-3$ and $-7$.