Треугольные числа (1) - PowerPoint PPT Presentation

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Треугольные числа (1)

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Фигурные Числа – PowerPoint PPT presentation

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Title: Треугольные числа (1)


1
????????????? ????? ?????????? ???????????????
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8,9 ??????
2
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??????????? ????? - ??? ????? ???????, ???????
????? ???? ??????????? ? ????? ???????????
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3
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N-? ??????????? ????? ??? ????? n ??????
??????????? ?????.
1
1 2 3
???
???
1 2 3 6
4
??????? ? 1
???????
??????? 13-? ??????????? ?????.
?? ??????? ?????? n 13
????? 91
5
??????? ? 2
???????
??????? 23-? ??????????? ?????.
?? ??????? ?????? n 23
????? 276
6
??????? ? 3
???????
????????? ?????? ???????, ??????? 5-? ???????????
?????.
?? ??????? ?????? n 5
????? 15
7
??????? ? 4
???????
???????? ?? ????? 120 ??????????? ???????
?? ??????? ?????? Tn 120
????? ????????
8
??????? ? 5
???????
???????? ?? ????? 22 ??????????? ???????
?? ??????? ?????? Tn 22
????? ?? ????????
9
??????? ? 6
???????
??????? ????? 5-?? ? 6-?? ??????????? ?????.
?? ??????? ?????? n 5 ? n 6
????? 36
10
??????? ? 7
???????
???? ????????? n, ???? ??????????? ????? ????? 91?
?? ??????? ?????? Tn 91
????? n 13
11
??????? ? 8
???????
???? ????????? n, ???? ????? ????? 77? ????????
?? ??????????? ??????
?? ??????? ?????? Tn 77
????? ?? ???????? ??????????? ??????
12
??????? ? 9
???????
??????? ??? ??????????? ????? ? ?????????? ?? 1
?? 20.
????? 1, 3, 6, 10, 15
13
??????
4. ???????? ?? ????? 1431 ??????????? ???????
1. ??????? 101?? ??????????? ?????.
5. ???? ????????? n, ???? ????? ????? 1081?
2. ??????? n ??????????? ?????.
3. ??????? ????? 99-??? ? 100-??? ???????????
?????.
6. ???????? ?? ????? 378 ??????????? ???????
14
??????????
Wiki ? ???????? ?????? ???????.???????
?????????? ? ????? ?., ???????????, 1964 376 ?.
(??? 55-60) ???????. ??????? ?????????? ?
?????????, ?????????, ?, 1961 (??? 27-29, 86-89,
189) ? ??.
?????? ??????????? http//pedsovet.su
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