Week 1-My Arithmetic Squence

3,6,9,12,15…..

General Equation: $t_{n}$ = $t_{1}$ +( ${n-1}$ )d

d=3

$t_{1}$ =3

$t_{2}$ =3+3=6

$t_{3}$ =3+2（3）=9

so， $t_{50}$ =3+49(3)

$t_{50}$ =150

$S_{50}$ =50/2( $t_{1}$ + $t_{50}$ )

$S_{50}$ =25(3+150）

$S_{50}$ =3825

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