Math, asked by jayant497, 9 months ago

Ap pls can u help me

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Answered by mangat007

2

as we know :

sn = n/2 (2a+ (n-1)d

we are given

sn = 3n^2 - 4n

n/2 ( 2a + (n-1) d = 3n....

a = -1 , d = 6

answer = 6n-7

thnx Mark brainliest ❤

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