Предмет: Алгебра, автор: aragon123

Оценить периметр равнобедренности треугольника с основанием a см. и боковой стороной b см. , если 11<a<15, 12<b<20

Ответы

Автор ответа: Voxman

$P_{(a,b,b)} = a + b + b = a+2b\\\\12<b<20\\\\24<2b<40\\\\11<a<15\\\\11+24<a+2b<15+40\\\\35<P_{(a,b,b)}<55\\\\$

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