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Câu 19:

Trong khai triển nhị thức $(a + 2)^{n + 6}$

Câu 19: Trong khai triển nhị thức (a+2)n+6(a + 2)^{n + 6}(a+2)n+6 (n ∈ ℕ). Có tất cả 17 số hạng. Vậy n bằng

Thông tin câu hỏi

Câu 19:

Trong khai triển nhị thức $(a + 2)^{n + 6}$ (n ∈ ℕ). Có tất cả 17 số hạng. Vậy n bằng