© 2018 danted2015

Week 1-My Arthmetic Sequence

The sequence is:

4, 7, 10, 13, 16

How to find t_{n}

t_{n}=t_1+(n-1)d t_{50}=4+(50-1)3 t_{50}=4+49 x 3 t_{50}=4+147 t_{50}=151

How to find S_{n}

S_n=\frac{n}{2}(t_1+t_n) S_n=\frac{50}{2}(4+151) S_{n}=25(155) S_{n}=3875

 

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