# Week 1-Arithmetic Sequence

$t_{50}$

$s_n=\frac{n}{2}(t_1$

3,8,13,18

d=5

T50 S50

T50=T1+49d

T50=3+245

T50=248

S50=

S50=[50(3+248)]➗2

S50=6275

$t_{1}={3}$

$t_{50}={?}$

After class I learned arithmetic progression and the arithmetic of arithmetic progression and how to solve questions .