djlstephen djlstephen

05-05-2020
Mathematics

contestada

Given that Sn = 1a + (n-1)d1
find the value of Sn if a = 3,n= 10 and
express d in terms of Sn, n and a
2

Respuesta :

angelina314159 angelina314159

05-05-2020

Answer:

d = (sn - 3)/9

Step-by-step explanation:

Answer Link

devishri1977 devishri1977

05-05-2020

Answer:

Step-by-step explanation:

Sn = a + (n-1)d

Sn = 3 + (10-1)*d

Sn = 3 + 9d

3 + 9d = Sn

9d = Sn - 3

d = (Sn - 3)/9

Answer Link

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