Mathematics, 18.10.2019 00:40 shinyelish6
What is the sum of the arithmetic series below 2+5+8++56
Answers: 1
= 
( first + last)
= a + (n - 1)d ← d is the common difference, a is the first term
= 
( 2 + 56 ) = 19 × 29 = 551
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