How many tems of an A.P.9,17,25,......must be taken to give a sum of 6

1.	How many tems of an A.P.9,17,25,......must be taken to give a sum of 636?
Answer» n= -53/4 n= 12 636=2(9)+(n-1)8636-18=(n-1)*8618/8+1=n78=n n=53/4 and n=12 Sum ka formula lagaoo.N ki value Nikal aa e gi...

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