Предмет: Алгебра, автор: Аноним

Алгебра. Даю 15 балів.

Потрібно вирішити 3 завдання, з максимальним поясненням і малюнками!

У 3 завданні знайти похідну)

Приложения:

Ответы

Автор ответа: ludmilaksenija2005
1

Объяснение:

1.

AA1=7 см

r=3 см

S=AA1•AB

AB=2•r=2•3=6 см

S=7•6=42 см²

ответ: 42 см²

2.

АВ=5 см

С=24π см²

С=2π•r ; r=C/2π=24π/2π=12 см

BC=r=12 см

по теореме Пифагора:

R=AC=√(AB²+BC²)=√(5²+12²)=√169=13 см

S=4πR²

S=4π•13²=676πcм²

ответ: 676 см²

3.

у=√(2х²-7х)

у'=(√(2х²-7х)d/dx=(√g)d/dg•(2x²-7x)d/dx=

=1/(2√g)•(4x-7)=1/(2√(2x²-7x))•(4x-7)=

=(4x-7)/(2√(2x²-7x))

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