.. 1 ..            1! 2! 3! N! 1.2 2.3 3.4 (N 1)N(I...

NGUYEN HAM TICH PHAN TO HOP CO DAP AN

Nội dung
Đáp án tham khảo

1

...

1 1

...















 









1! 2! 3!

n!

1.2 2.3 3.4

(n 1)n

(II)



1 1

1 1

1

1

1

1









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