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s201141181s
@s201141181s
July 2022
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(3x^3+2x^2+x)/(4x^2-49)>или равно 0. Решите неравенство.
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sedinalana
Verified answer
X(3x²+2x+1)/[(2x-7)(2x+7)]≥0
3x²+2x+1=0
D=4-12=-8<0 ⇒x∈R
x=0
2x-7=0⇒x=3,5
2x+7=0⇒x=-2,5
_ + _ +
------------(-3,5)----------[0]-------------------(3,5)--------------
x∈(-3,5;0] U (3,5;∞)
1 votes
Thanks 6
s201141181s
небольшая опечатка 2х+7=0,х=-3,5
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Answers & Comments
Verified answer
X(3x²+2x+1)/[(2x-7)(2x+7)]≥03x²+2x+1=0
D=4-12=-8<0 ⇒x∈R
x=0
2x-7=0⇒x=3,5
2x+7=0⇒x=-2,5
_ + _ +
------------(-3,5)----------[0]-------------------(3,5)--------------
x∈(-3,5;0] U (3,5;∞)