for an a.p if the first term is 8 and the common difference is 8 find Sn
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Answer:
4n + 4n^2
Step-by-step explanation:
Sn = n/2(16 + (n-1)8)
= n/2(16 - 8 + 8n)
= n/2(8 + 8n)
= 4n + 4n^2
prathamshailja:
okkkk
4n(n-1) is 4n + 4n^2 only
if you open the brackets you get 4n + 4n^2 and i have shown that
okkkkk
what is this sign "^"
i don't get this sign
that means square
okk thank u so much
mark me the brainiest if you want thx
okay
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