How do I solve this Ʃ (10 above) (i=1 bottom) 2 ?
10
Ʃ 2 = ???
i=1
I found a formula but I am not really sure if it's all right.
n
Ʃ x = (n-m+1)*x
k=m
And again I found this formula for sum of 1:
n
Ʃ 1 = (n-m+1)
i=m
I would really appreciate an explanation :)
Thank you in advance!
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Verified answer
Ʃ(i=1 to 10) 2
= 2+2+2+2+2+2+2+2+2+2
= 20
You can use the formula that you found, but it doesn't really make things any simpler:
m = 1
n = 10
x = 2
=> Ʃ... = (10-1+1)*2 = 10*2 = 20.