f (x)=x2+x+2 e g(x)=-3x2-5x+1
Soluções para a tarefa
Resposta:
f(x) = 2x² - 6x - 4
g(x) = - 3x² - 5x + 1
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a)
f(x) = 2x² - 6x - 4
f(3) = 2.3² - 6.3 - 4
f(3) = 2.9 - 18 - 4
f(3) = 18 - 18 - 4
f(3) = 0 - 4
f(3) = - 4
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b)
f(x) = 2x² - 6x - 4
f(-2) = 2.(-2)² - 6.(-2) - 4
f(-2) = 2.4 + 12 - 4
f(-2) = 8 + 8
f(-2) = 16
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c)
f(x)=2x² - 6x -4
f(0) = 2.0² - 6.0 - 4
f(0) = 2.0 - 0 - 4
f(0) = 0 - 0 - 4
f(0) = - 4
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d) f(- 0,2)
f(x)= 2x² - 6x - 4
f( - 0,2) = 2.(-0,2)² - 6.(-0,2) - 4
f( - 0,2) = 2. (0,04) + 1,2 - 4
f( - 0,2) = 0,08 + 1,2 - 4
f( - 0,2) = - 2,72
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e)
g(x)= - 3x² - 5x +1
g(1) = - 3.1² - 5.1 + 5
g(1) = - 3.1 - 5 + 5
g(1) = - 3 - 5 + 5
g(1) = - 3
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f)
g(x) = - 3x² - 5x + 1
g(-4) = - 3. (-4) - 5.(-4) + 1
g( - 4) = 12 + 20 + 1
g( - 4) = 32 + 1
g(-4) = 33
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g)
g(x)=-3x²-5x+1
g(0) = - 3.0² - 5.0 + 1
g(0) = - 3.0 - 0 + 1
g(0) = 0 - 0 + 1
g(0) = 1
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h)
g(x) = - 3x² - 5x + 1
g(1/2) = - 3 . 1² - 5.1 + 1
2² 2
g(1/2) = - 3 - 5 + 1
4 2
g(1/2) = - 3 - 10 + 4
4
g (1/2) = - 13 + 4
4
g(1/2) = - 9
4
Espero ter ajudado❤❤❤❤❤❤❤