Question

ofer 25 puncte . urgent​

Answer 1

Răspuns:

Explicație pas cu pas:

Answer 2

$\it a)\ \ f(-x)=5\cdot(-x)^4-11=5x^4-11=f(x) \Rightarrow f\ -\ par\breve a\\ \\ b)\ \ f(-x)=\sqrt{25-4\cdot (-x)^2}=\sqrt{25-4x^2}=f(x)\ \Rightarrow f\ -\ par\breve a\\ \\ c)\ \ f(-x)= \dfrac{(-x)^3+(-x)}{(-x)^2+4}=\dfrac{-x^3-x}{x^2+4} = -\dfrac{x^3+x}{x^2+4}=-f(x) \Rightarrow f-\ impar\breve a$

$\it d)\ f(-x)=|-x-4|-|4-x|=|-(4+x)|-|-(x-4)|=|4+x|-|x-4|= \\ \\ \\ = -(|x-4|-|4+x|) = -f(x) \Rightarrow f\ -\ impar\breve a$