PLZ HELP I DONT UNDERSTAND



An odd degree power function has a positive leading coefficient.


Which answer correctly describes the function's end behavior?


As x→∞ , f(x)→−∞ (a)

As x→−∞ f(x)→∞


As x→∞ , f(x)→∞ (B)

As x→−∞ , f(x)→−∞


As x→∞ , f(x)→∞ (C)

As x→−∞ , f(x)→∞


As x→∞ , f(x)→−∞

As x→−∞ , f(x)→−∞ (D)

Respuesta :

Answer:

The correct option is B.

Step-by-step explanation:

If a function is odd degree power function has a positive leading coefficient, then

[tex]f(x)\rightarrow \infty\text{ as }x\rightarrow \infty[/tex]

and

[tex]f(x)\rightarrow -\infty\text{ as }x\rightarrow -\infty[/tex]

Let an odd degree power function has a positive leading coefficient be

[tex]f(x)=x^3[/tex]

As the value of x increases without bound then the value of f(x) is also increases without bound.

[tex]lim_{x\rightarrow \infty}f(x)=(\infty)^3=\infty[/tex]

As the value of x decreases without bound then the value of f(x) is also decreases without bound.

[tex]lim_{x\rightarrow -\infty}f(x)=(-\infty)^3=-\infty[/tex]

Therefore option B is correct.