Question

(1).The odd natural numbers have been divided in groups as :
(1,3); (5,7,9, 11); (13, 15, 17, 19, 21, 23);
Show that the sum of numbers in the n th group is 4n3.
(2). Show that the sum of the numbers in each of the following groups is
the square of an odd positive integer.
(1); (2, 3, 4); (3, 4, 5, 6, 7); ......​

Answer 1

Answer:

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