Question

Sa se calculeze fc D-> R
f(x) 3x +2 ( supra x-1 ) = R€R \{1}​

Answer 1

Răspuns:

f(x)=(3x+2)/(x-1)

f `(x)=$\frac{(3x+2) `(x-1)-(3x+2) (x-1) `}{(x-1)^2}$

=$\frac{3(x-1)-(3x+2)*1}{(x-1)^2}$=

$\frac{3x-3-3x-2}{(x-1)^2}$=

$\frac{-5}{(x-1)^2}$

Explicație pas cu pas: