Math 11 Uncategorized

Week 1 – My Arthmetic Sequence

February 5, 2018February 5, 2018 joyk2015Leave a comment

-17, -11, -5, 1, 7…

$t_{50}$ = $t_{1}$ + (n- 1)d

$t_{50}$ = -17+ (50- 1)6

$t_{50}$ = -17+ (49)6

$t_{50}$ = -17+ 294

$t_{50}$ = 277

Sn= $S_n=\frac{n}{2}$ (2 $t_{1}$ + (n-1)d)

Sn= $S_n=\frac{50}{2}$ (2(-17)+(50-1)6)

Sn= 25(-34+(49)6)

Sn= 25(-34+294)

Sn= 25(260)

Sn= 6500

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