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vbakalina
@vbakalina
July 2022
1
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Найдите область определения функции
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mikael2
-x²+2x+63≥0
x(x+8)≠0
x²-2x-63≤0
x≠0 x≠-8
x²-2x-63=0 x1=9 x2=-7 по т. Виета
------------------ -7-------0--------------9-------------------
+ - +
x∈[-7;0)(0;9]
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Answers & Comments
x(x+8)≠0
x²-2x-63≤0
x≠0 x≠-8
x²-2x-63=0 x1=9 x2=-7 по т. Виета
------------------ -7-------0--------------9-------------------
+ - +
x∈[-7;0)(0;9]