Предмет: Алгебра, автор: makmutaziza

Пожалуйста помогите сделать все! Только не пишите ерунду ( а то бан) Срочно прошу!

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Ответы

Автор ответа: sangers1959

Объяснение:

$h=6t-4t^2.$

$h'=(6t-4t^2)'=0\\6-8t=0\\8t=6\ |:68\\t=0,75.$

Ответ: через 0, 75 с мяч достигнет наибольшей высоты.

В)

$6t-4t^2=0\\2t*(3-2t)=0\ |:2\\t*(3-2t)=0\\t_1=0\notin\\3-2t=0\\2t=3|:2\\t=1,5.$

Ответ: через 1,5 с после броска мяч упадёт на землю.

makmutaziza: огромное спасибо ;)

sangers1959: Удачи.

makmutaziza: можно спросить |: это дробь?

sangers1959: Да.

makmutaziza: Добрый вечер, мне сказали что это по теме 10-11 класса.

makmutaziza: а я в 8 классе

sangers1959: Вы, наверное, не проходили производную?

makmutaziza: нет :(

sangers1959: Тогда А) решается по другому: t=-b/2a=-6/(2*(-4))=6/8=0,75 (c).

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