Предмет: Математика, автор: shatohinaaaa

решите пожалуйста со всеми формулами , даю 15 баллов

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Ответы

Автор ответа: uninform

1

Ответ:

31.5

Пошаговое объяснение:

d=-1,2+6.2=5

a5=3.8+2*5=13.8

S=(-1.2+13.8)*5/2=31.5

shatohinaaaa: спасибо большое

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