Предмет: Алгебра, автор: factsmillerr

Найдите точку, в которой значение функции равно 3,5

Приложения:

7x8: 1,96 расчеты нужны?
factsmillerr: Да, я просто не понимаю

Ответы

Автор ответа: 7x8
1

Ответ:

1,96

Объяснение:

f(0)=0

поэтому функция имеет вид

f(x)=\sqrt{ax}\\\\f(4)=5\\\\\sqrt{a\cdot 4}=5\\\\\sqrt{4a}=5\ \ \ |()^2\\\\4a=25\ \ \ |:4\\\\a=\frac{25}{4}\\\\f(x)=\sqrt{\frac{25}{4}x}=\frac{5}{2}\sqrt{x}

\frac{5}{2}\sqrt{x}=3,5\ \ \ |:\frac{5}{2}\\\\\sqrt x=1,4\ \ \ |()^2\\\\x=1,96


factsmillerr: AAAA СПАСИБОООО ОГРМОНОЕ
7x8: не за что
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