[tex]\boxed { \boxed { T_n = a_1 + d(n - 1)}}[/tex]
[tex]\text {Given that }a_1 = 50 \text { and } d = 4[/tex]
[tex]T_n = 50 + 4(n - 1) [/tex]
[tex]T_n = 50 + 4n - 4[/tex]
[tex]T_n = 46 + 4n[/tex]
[tex]\boxed { \boxed {T_n = 46 + 4n }}[/tex]
When n = 20,
[tex]T_{20} = 46 + 4(20) = 126[/tex]
[tex]\boxed { \boxed {\text{Answer: The 20th term is 126}}}[/tex]
