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bhduc264
2 năm trước
1 . Viết phương trình đường thẳng bậc nhất ( d ) biết trong mặt phẳng tọa độ Oxy đường thẳng ( d ) song song với đường thẳng ( d ' ) : 2x + 3y = 1 và đường thẳng ( d ) cắt trục tung tại điểm có tung độ bằng 3 . 2 . Xác định hàm số bậc nhất y = ax + b biết đồ thị hàm số đi qua M ( - 1 ; 2 ) và song song với đường thẳng y = 2 - 3x . 3 . Cho hàm số : y = mx + n . Tìm m , n biết đồ thị của hàm số đã cho song song với đường thẳng ( d1 ) : y = 2x - 3 và đi qua giao điểm Q của hai đường thẳng ( d , ) : y = 3x + 2 ; ( d ) : y = - 2x - 3 . 4 . Tìm giá trị của m để đồ thị của các hàm số y = x + ( 2 + m ) và y = 2x + ( 3 - m ) cắt nhau tại một điểm trên trục tung ? Tìm toạ độ giao điểm đó ? 5 . Tìm giá trị của k để ba đường thẳng : y = - 2x + 3 ( d ) ; y = 3x - 2 ( d2 ) ; y = kx + k - 5 ( d ) đồng qui trong mặt phẳng tọa độ
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