Asked by kumar
Find four numbers in AP whose sum is 20 and sum of whose squares is 120.
Answers
Answered by
bobpursley
there is a trick to this. Let the difference be 2d, and the numbers be
x-3d, x-d, x+d, x+3d
https://www.youtube.com/watch?v=y77ULGlzZxQ
x-3d, x-d, x+d, x+3d
https://www.youtube.com/watch?v=y77ULGlzZxQ
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