Math, asked by Parvani9879, 1 year ago

the sum of the third and ninth term of an A.P. is 8. find the sum of the first 11 terms of the progression

Answers

Answered by 2000ajay12

3

a+2d+a+8d=8
=>a+5d=4
S11=(11/2)(2a+10d)
=>11(4)=44

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