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1. N (>0). , , ( ).
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N (>0). N2 + (N+1)2 + (N+2)2 + + (2N)2. | |
N (>0) k (<N). 12/N + 22/N + + k2/N. | |
N (>0). (1+2)2 + (2+3)2 + + (N+(N+1))2. | |
N (>0). 13 + (-2)3 + 33 + (-4)3 + (N ). | |
N (>0) k (<N). (k)2/N + (2k)2/N + + ((N‑1)*k)2/N. | |
N (>0). 11 + 22 + + NN. Power(, ) ( Math). | |
N (>0). Sin(x) + Sin(2x) + + Sin(Nx). | |
X (|X|<1) N (>0). X + X2/2 + X3/3 + + XN/N. Power(, ) ( Math). | |
N (>0). N2 + (N-1)2 + (N-2)2 + + 12. | |
N (>0). AK : A0 = 1, AK = (AK−1 + 1)/K, K = 1, 2, A1, A2, , AN. | |
N (>1). FK ( ) : F1 = 1, F2 = 1, FK = FK−2 +FK−1, K = 3, 4, F1, F2,..., FN. | |
N (>1). AK : A1 = 1, A2 = 2, AK = (AK−2 + 2AK−1)/3, K = 3, 4, A1, A2,, AN. | |
N (>2). AK : A1 = 1, A2 = 2, A3 = 3, AK = AK−1 +AK−2 −2AK−3, K = 4, 5,... A1, A2, , AN. | |
N (>0). AK : A0 = 2, AK = 2 + 1/AK−1, K = 1, 2, A1, A2, , AN. |
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3.
N : A1, A2, , AN. . | |
. , . 0 , .. , 0, . | |
A B (A<B). A B. | |
. , 4. 0 . | |
2 b N (, ). , (; b). | |
. , . 0 . : 2 3 3 8 5 4 4 4 -7 1 -1 -1 2 0 16 (.. 3+3+4+4+4+(-1)+(-1)) | |
A B (A > B). A B ( ). , B, A. | |
N (>1) N . , . | |
K ; 0. , K. , 0. | |
N N , . , ( , 0). | |
N (>1) N . , 0; , . |