Week 1 – Arithmetic Sequences

5,9,13,17,21…

$t_{50}=t_1+(50-1)4$ $t_{50}=5+49*4$ $t_{50}=5+196$ $t_{50}=201$

$S_{50}=\frac{50}{2}(t_1+t_{50})$ $S_{50}=25(5+201)$ $S_{50}=25*206$ $S_{50}=5150$

Matthew's Blog