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Dedeguata
@Dedeguata
May 2020
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Determine o conjunto solução da seguinte equação biquadrada
1/x²-4 - 1/x^4 = 6/x^4(x²-4)
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Verified answer
1
-
1
=
6
x² - 4 x⁴ x⁴(x² - 4) mmc = x⁴(x² - 4)
x⁴ - x² - 4 = 6
x⁴(x² - 4) elimina denominador x⁴ - x² - 4 = 6
x⁴ - x² - 4 = 6 para x² = y
(x²)² - x² - 4 - 6 = 0
(y)² - y - 10 = 0
y² - y - 10 = 0
a = 1 b= - 1 c = - 10
Δ = b² - 4.a.c
Δ = (-1)² - 4.(1).(-10)
Δ = 1 + 40
Δ = 41
y =
- b ± √Δ
2.a
y =
- (-1) ± √41
2.1
y =
+ 1 ± √41
2
y'=
1 + √41
2
y" =
1 - √41
2
S[(1 + √41)/2 , (1 - √41)/2]
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Verified answer
1 - 1 = 6x² - 4 x⁴ x⁴(x² - 4) mmc = x⁴(x² - 4)
x⁴ - x² - 4 = 6
x⁴(x² - 4) elimina denominador x⁴ - x² - 4 = 6
x⁴ - x² - 4 = 6 para x² = y
(x²)² - x² - 4 - 6 = 0
(y)² - y - 10 = 0
y² - y - 10 = 0
a = 1 b= - 1 c = - 10
Δ = b² - 4.a.c
Δ = (-1)² - 4.(1).(-10)
Δ = 1 + 40
Δ = 41
y = - b ± √Δ
2.a
y = - (-1) ± √41
2.1
y = + 1 ± √41
2
y'= 1 + √41
2
y" = 1 - √41
2
S[(1 + √41)/2 , (1 - √41)/2]