Вопрос школьника по предмету Математика
Почему производная -8sinx раскрывается как просто cosx? Куда пропадает -8?
Ответ учителя по предмету Математика
Производная функции — скорость изменения —
Коэффициент 8 — НЕ ПРОПАДАЕТ
Y(x) = 8*sinX
Y'(x) = 8*cosX — ОТВЕТ
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Lesson 9. Grammar Revision
2. Complete the sentences with the Past Simple Tense of the verbs in brackets.
my grandfather (1) to colleсted stamps when he was a boy.
He (2) to began to learn many interesting facts about history. And he (3)to knew many interesting stories about famous people, too. He (4) to kept his collection in a special album. Later when he (5) to travelled he always (6) to brought many stamps for his collection.