#802 · Algebra · Sequences & series

Sum of decreasing arithmetic series

Find the sum of the first 17 terms of the arithmetic progression $49, 44, 39, \dots$ .

~2 minAnswer checked instantlyarithmetic progressionsum

H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. IV. Arithmetical Progression, Examples IV.a, No. 2

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