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Thaisinaiany
@Thaisinaiany
October 2020
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helviotedesco
Verified answer
12)
x²-10x+16=0
b²-4ac
(-10)²-4.1.16
100-64
36
-(-10)+-6/2
10+6/2 = 8
10-6/2=2
RESPOSTA: c) S= {2,8}
13)
a<0
b²-4ac
4²-4.(-1).(-5)
16-20
-4
Yv=-(-4)/4.(-1)
Yv= 4/-4
Yv=-1
RESPOSTA: a) Im= {XeR/x
≤ -1}
14)
a<0 valor máximo
b²-4ac
30²-4.(-1).(-125)
900-500
400
Yv= - 400/ 4. (-1)
Yv= -400/ -4
Ymaximo= 100
RESPOSTA: B
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Verified answer
12)x²-10x+16=0
b²-4ac
(-10)²-4.1.16
100-64
36
-(-10)+-6/2
10+6/2 = 8
10-6/2=2
RESPOSTA: c) S= {2,8}
13)
a<0
b²-4ac
4²-4.(-1).(-5)
16-20
-4
Yv=-(-4)/4.(-1)
Yv= 4/-4
Yv=-1
RESPOSTA: a) Im= {XeR/x ≤ -1}
14)
a<0 valor máximo
b²-4ac
30²-4.(-1).(-125)
900-500
400
Yv= - 400/ 4. (-1)
Yv= -400/ -4
Ymaximo= 100
RESPOSTA: B