Math, asked by HulkVerine, 1 year ago

7 times of 7th term of AP is 11 times of 11th term of AP find 1st and common difference????

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Answered by abcd157

1

7(a+6d)=11(a+10d), 7a+42d=11a+110d, 11a-7a+110d-42d=0, 4a+68d=0,4a=-68d,a=-68/4d,a=-17d,d=-a/17 answer

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