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may_pho_nui
2 năm trước
Cho biểu thức D= $\frac{(2!)^{2}}{1^{2}}$ +$\frac{(2!)^{2}}{3^{2}}+$\frac{(2!)^{2}}{5^{2}}+$\frac{(2!)^{2}}{7^{2}}+....+$\frac{(2!)^{2}}{2015^{2}} So sánh D với 6. Biết n ∈ N
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