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TVNGHIA
2 năm trước
Cho biểu thức M= a^2-1/15. (a+1/2a-2+3/a^2-1-a+3/2a+2) a. Tìm điều kiện xác định của a để giá trị của biểu thức được xác định b. Chứng minh biểu thức M được xác định thì giá trị của nó không phụ thuộc vào biến a
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