Question

Find the sum of 44+42 +40 +..... 20.​

Answer 1

Answer:

here is your correct answer

Answer 2

ANSWER :

Given : a = 44

d = -2

an = 20

an = a+(n-1)d

20 = 44+(n-1)(-2)

20 = 44-2n+2

2n =44+2-20

2n = 26

n = 13

Sn = n/2(a+an)

Sn = 13/2(44+20)

= (13×64)/2

= 13×32

= 416

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