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qwertyhappy54
@qwertyhappy54
May 2021
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решить систему. алгебра. 10 класс. тема: система показательных неравенств
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m11m
Verified answer
{xy=3
{y=3.5-x
{-xy<0
x(3.5-x)=3
3.5x-x² -3=0
x² -3.5x+3=0
D=12.25-12=0.25
x₁=(3.5-0.5)/2=1.5
x₂=(3.5+0.5)/2=2
При х=1,5
y=3.5-1.5=2
-1.5*2<0
-3<0 - верно
При х=2
у=3,5-2=1,5
-2*1,5<0
-3<0 - верно
Ответ: (1,5; 2)
(2; 1,5)
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Answers & Comments
Verified answer
{xy=3
{y=3.5-x
{-xy<0
x(3.5-x)=3
3.5x-x² -3=0
x² -3.5x+3=0
D=12.25-12=0.25
x₁=(3.5-0.5)/2=1.5
x₂=(3.5+0.5)/2=2
При х=1,5
y=3.5-1.5=2
-1.5*2<0
-3<0 - верно
При х=2
у=3,5-2=1,5
-2*1,5<0
-3<0 - верно
Ответ: (1,5; 2)
(2; 1,5)