Answer:
Step-by-step explanation:
Given: , ,
Find:
Formula:
Solution:
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Verified answer
Answer:
The sum of the first ten terms of the sequence is 265.
Step-by-step explanation:
Given:
,
, ![d=5 d=5](https://tex.z-dn.net/?f=d%3D5)
Find:![S_{10}=? S_{10}=?](https://tex.z-dn.net/?f=S_%7B10%7D%3D%3F)
Formula:![S_n=\frac{n}{2}[2a_1+(n-1)d] S_n=\frac{n}{2}[2a_1+(n-1)d]](https://tex.z-dn.net/?f=S_n%3D%5Cfrac%7Bn%7D%7B2%7D%5B2a_1%2B%28n-1%29d%5D)
Solution:
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