delaneyjane2035
16.09.2021 •
Mathematics
The formula
S-
man+an)
2 gives the partial sum of an arithmetic sequence. What is the formula solved for a,?
2S-a, n
n
2S+a, n
a,
n
a, -2S+an+n
a, -28-a, nun
Solved
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Ответ:
360 divided by 5 equal pieces equals to 72 a whole circle is 360 degrees