Предмет: Алгебра, автор: кити4554

ПОМОГИТЕ!
f штрих от пи/2,если f(х)=хcos2х

Ответы

Автор ответа: EJlenaRain

f'=x'* cos 2x + x(cos 2x)'= cos 2x+ 2x cos x
f'(pi/2)= cos pi + pi * cos pi/2 = -1 +0 = -1

Автор ответа: Аноним

Производная косинуса минус синус !!!

Автор ответа: EJlenaRain

ой,точно, спасибо)

Автор ответа: Аноним

f(x)=xcos2x
f '(x)=x' cos2x+x cos'2x=cos2x-2xsin2x
f '(π/2)=cosπ-2π·sinπ=-1-0=-1

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ПОМОГИТЕ! f штрих от пи/2,если f(х)=хcos2х

Ответы

ПОМОГИТЕ!
f штрих от пи/2,если f(х)=хcos2х