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CBSE Class 10 Answered

If an A.P. consists that a1+a2+a3=27,and a 1 cross times a 2 cross times a 3=405 find a1,a2,a3
Asked by atharvagpatil | 25 Aug, 2018, 12:45: PM
answered-by-expert Expert Answer
begin mathsize 18px style straight a subscript 1 plus straight a subscript 2 plus straight a subscript 3 equals 27
let
straight a minus straight d comma space straight a comma space straight a plus straight d space be space the space numbers
straight a minus straight d space plus space straight a space plus space straight a plus straight d equals 27
3 straight a equals 27
straight a equals 9
open parentheses straight a minus straight d close parentheses straight a open parentheses straight a plus straight d close parentheses equals 405
open parentheses 9 squared minus straight d squared close parentheses equals 45
straight d squared equals 36
straight d equals plus-or-minus 6
3 comma 9 comma 15 space or space 15 comma 9 comma 3
end style
Answered by Arun | 27 Aug, 2018, 10:44: AM
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