Ответ:
Объяснение:
№1 . a) ( √ x + lnx )' = (√ x)' + ( lnx )' = 1/2√ x + 1/x ;
б) ( x³sinx )' =(x³)' sinx + x³ (sinx )' = 3x²sinx + x³cosx .
№2 . f(x) = x³ + 3x , x₀ = 2 ;
y = f(x₀) + f '(x₀) *( x - x₀ ) ;
f( 2 ) = 2³ + 3*2 = 14 ; f '(x) = ( x³ + 3x )' = 3x² + 3 ; f '( 2 ) = 3* 2² + 3 = 15 ;
y = 14 + 15(x - 2 ) = 14 + 15x - 30 = 15x -16 ; y = 15x - 16 .
№3 . f(x) = 3x² + 1 ; M ( 1 ; - 2 ) ;
F(x) = 3 x³/3 + x +C = x³ + x + C ; F(x) = x³ + x + C ;
M (1 ; - 2 ) : 1³ + 1 + C = - 2 ; C = - 4 ; F(x) = x³ + x - 4 .
В - дь : F(x) = x³ + x - 4 .
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Answers & Comments
Ответ:
Объяснение:
№1 . a) ( √ x + lnx )' = (√ x)' + ( lnx )' = 1/2√ x + 1/x ;
б) ( x³sinx )' =(x³)' sinx + x³ (sinx )' = 3x²sinx + x³cosx .
№2 . f(x) = x³ + 3x , x₀ = 2 ;
y = f(x₀) + f '(x₀) *( x - x₀ ) ;
f( 2 ) = 2³ + 3*2 = 14 ; f '(x) = ( x³ + 3x )' = 3x² + 3 ; f '( 2 ) = 3* 2² + 3 = 15 ;
y = 14 + 15(x - 2 ) = 14 + 15x - 30 = 15x -16 ; y = 15x - 16 .
№3 . f(x) = 3x² + 1 ; M ( 1 ; - 2 ) ;
F(x) = 3 x³/3 + x +C = x³ + x + C ; F(x) = x³ + x + C ;
M (1 ; - 2 ) : 1³ + 1 + C = - 2 ; C = - 4 ; F(x) = x³ + x - 4 .
В - дь : F(x) = x³ + x - 4 .