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" If Sum of in terms of an A.P be 3n2+n and it's common difference is 6 then its first term isa) 2b) 3c) 1d) 4​

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solve using the formulaT = a+(n-1)dSn=2a+(n-1)d or Sn=a+L ( L=Last TERM )Step-by-step explanation:definitely using CONCEPT and your intelligency you will GET answer MARK me brainliest ✌️



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