qtina217 qtina217

17-12-2020
Mathematics

contestada

Let Sn, be the sum of the first n terms of the arithmetic series 2+4+6+....
(a)
Find
(i)
S4
(ii) S100

Answer: 10 100
How do you work it out though?

Respuesta :

Cloudnano Cloudnano

17-12-2020

i) 20
ii) 19900

formula : sn = n/2[2a+(n-1)d ]

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