Math, asked by edwindias25, 8 months ago

1,7,13,.... is a arithmetic sequence. find the sum of consecutive 22 term of this sequence?

Answers

Answered by anurag2147

0

n= 22 , a= 1 , d= 7-1= 6 , Sn =?

Sn = n/2{2a+(n-1)d}

= 22/2 {2+21×6}

= 11×128

= 1408

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