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Nimfa-mama [501]
2 years ago
11

A direct variation function contains the points (-9,-3) and (-12,-4). which equation represents the function?​

Mathematics
1 answer:
Tomtit [17]2 years ago
5 0

Answer:

y = x/3

Step-by-step explanation:

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2 years ago
Graph the following inequality. Then click to show the correct graph. x &lt; -1
docker41 [41]

Answer:

The graph in the attached figure

Step-by-step explanation:

we have

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8 0
4 years ago
Với điều kiện nào của m thì phương trình ( 3m^2 - 4) x -1=m-x có nghiệm duy nhất?
Shtirlitz [24]
 <span>a, để pt có nghiệm thì denta ≥ 0 <=> (3-m)^2 - 4( 3-2m) ≥ 0 <=> m^2 +2m-3 ≥ 0 ( ^ là mũ) 
giải bpt mới tìm được đó ta đc : m ≤ -3 hoặc m ≥ 1 
b, * Xét m-1=0 <=> m=1 => thay m=1 vào pt thì pt có 1 nghiệm là 1/8 (1) 
* Xét m-1 ≠ 0 <=> m ≠ 1 
=> pt có nghiệm khi denta' ≥ <=> (m+3)^2 - (m-1)(-m+2) ≥0 <=> 2m^2 +3m+11 ≥ 0 (*) 
-> bpt (*) có denta < 0 nên nó luôn đúng với mọi m ≠1 -> denta của pt đã cho luôn > 0 với mọi m ≠ 1 (2) 
từ (1) (2) => với mọi m pt luôn có nghiệm </span>
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3 years ago
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