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Jose38
@Jose38
December 2019
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Se f (x) = x² e g(x) = x + 2, determine x tal que f(x) = g (x).
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edadrummond
Temos então x²=x+2 ⇒x²-x-2=0
Δ=(-1)²-4×1×(-2)=1+8=9
x=[-(-1)+-√9] / 2 ⇒x=[1+-3] /2 ⇒x'=-1 e x''= 2
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Δ=(-1)²-4×1×(-2)=1+8=9
x=[-(-1)+-√9] / 2 ⇒x=[1+-3] /2 ⇒x'=-1 e x''= 2