rmatl05 rmatl05

31-08-2019
Mathematics

contestada

Find the sum of the arithmetic series in which a1 = –68, d = –3, and n = 20.

Respuesta :

thedemon840 thedemon840

31-08-2019

Answer:

Sum = -1930

Step-by-step explanation:

Sum of an arithmetic series;

;Sum = n/2[ 2a1 + ( n - 1 )d]

Then substitute into the equation above

; Sum = 20/2 [ 2(-68) + (19)-3 ]

; Sum = 10 [ -136 - 57 ]

Therefore the sum of the arithmetic series

is....; -1930

Answer Link

yuly3000 yuly3000

27-02-2021

Answer:

-1930

Step-by-step explanation:

Answer Link

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