prove that the sum of any number of terms of the arithmetic sequence 16,24,32.... starting from the first, added to 9 gives a perfect square guys I do got that
Mathématiques
hishengopi
Question
"prove that the sum of any number of terms of the arithmetic sequence 16,24,32.... starting from the first, added to 9 gives a perfect square" guys I do got that the answer 4n2+12n+9=(2n+3)2 I want to how sum becoming a perfect square