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dana23melnyk
@dana23melnyk
July 2022
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Знайдіть нулі функції у=-4х^4+5х^2-1
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sedinalana
Verified answer
-4x^4+5x^2-1=0
4x^4-5x^2+1=0
x^2=a
4a^2-5a+1=0
D=25-16=9
a1=(5-3)/8=1/4⇒x^2=1/4⇒x=-1/2 U x=1/2
a2=(5+3)/8=1⇒x²=1⇒x=-1 U x=1
(-1;0),(-1/2;0)(1/2;0),(1;0)
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Answers & Comments
Verified answer
-4x^4+5x^2-1=04x^4-5x^2+1=0
x^2=a
4a^2-5a+1=0
D=25-16=9
a1=(5-3)/8=1/4⇒x^2=1/4⇒x=-1/2 U x=1/2
a2=(5+3)/8=1⇒x²=1⇒x=-1 U x=1
(-1;0),(-1/2;0)(1/2;0),(1;0)