... to students in this classroom Everybody (think) that Jack was the laziest of all the pupils Unless he (ask) you, don’t give him anything What (happen) if I press this button? Tom wondered ... lived in DaNang once But I don’t live there anymore → I used 10. This is my second visit to Nha Trang → This is the second time Question V: Fill in each black with the correct ... hit his head on the r...
Ngày tải lên: 16/05/2014, 21:28
... - 2 010 + x + 2 010 - =0 1 1 ÷ - x +2 010 - ÷ = 2 2 1 = x + 2 010 - (2) 2 1 = - x + 2 010 + (3) 2 x + ≥ Giải (2) : (2) ⇔ (x + 1) = x + 2 010 (4) (4) ⇔ (x + 1)2 = x + 2 010 ⇔ x2 + x - ... - x = - m - Ta có x1 + x = 10 ⇔ (x1 + x2)2 - 2x1x2 = 10 ⇔ (m - 1)2 + (m + 3) = 10 m = ⇔ 4m - 6m + 10 = 10 ⇔ 2m (2m - 3) = ⇔ m = 2 3) Từ (2) ta có m = -x1x2 - vào (1) ta...
Ngày tải lên: 16/05/2015, 23:35