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OpenStudy (anonymous):
Gausse's approach for 4+10+16+22+...+58
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Parth (parthkohli):
The sum of an arithmetic sequence is: \(\Large \color{MidnightBlue}{\Rightarrow {n \over 2}(a_{1} + a_{l})}\)
Parth (parthkohli):
a1 is the first term. aL is the last term. n is the number of terms.
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