Week 1 – My Arthmetic Sequence

Posted on February 5, 2018 by dmitryk2015

This week in math we learned about Arithmetic Sequences and Series.

My arithmetic sequence is 6, 13, 20, 27, 34

To find $t_n$ , I need to use the formula $t_n=t_1+(n-1)d$

So to find $t_{50}$ I need to do $t_{50}=6+(50-1)7$

The answer is 349.

To determine the sum of the first 50 terms or $S_{50}$ , I have to use the formula $S_n=\frac{n}{2}(2t_1+(n-1)d)$ , so I would use $S_{50}=\frac{50}{2}(2*6+(50-1)7)$ , which would equal 8875.

M	T	W	T	F	S	S
	1	2	3	4	5	6
7	8	9	10	11	12	13
14	15	16	17	18	19	20
21	22	23	24	25	26	27
28	29	30	31

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Week 1 – My Arthmetic Sequence