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3 years ago

I don't understand this. Plz help!!!

Mathematics

2 answers:

Scorpion4ik [409]3 years ago

8 0

Hi, I just want you to know that you can use “Desmos Graphing Calculator” to help you graph things. I use desmos, scientific and graphing on all my math assignments. It should help with your question as well :)

Leona [35]3 years ago

5 0

Answer:

if you can, start from the y intercept (4) and then go 3 up,2 right

Step-by-step explanation:

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Let f(x) = x+2/x+6 <br> f^-1(-6) =

GREYUIT [131]

We can explicitly find the inverse. If $f^{-1}(x)$ is the inverse of $f(x)$ , then

$f\left(f^{-1}(x)\right) = \dfrac{f^{-1}(x)+2}{f^{-1}(x)+6} = x$

Solve for the inverse :

$\dfrac{f^{-1}(x) + 2}{f^{-1}(x) + 6} = x$

$\dfrac{f^{-1}(x) + 6 - 4}{f^{-1}(x) + 6} = x$

$1 - \dfrac4{f^{-1}(x) + 6} = x$

$1 - x = \dfrac4{f^{-1}(x) + 6}$

$f^{-1}(x) + 6 = \dfrac4{1-x}$

$\implies f^{-1}(x) = \dfrac4{1-x} - 6$

Then when x = -6, we have

$f^{-1}(-6) = \dfrac4{1-(-6)} - 6 = \dfrac47-6 = \boxed{-\dfrac{38}7}$

Alternatively, we can first solve for x such that $f(x) = -6$ . Then taking the inverse of both sides, $x = f^{-1}(-6)$ . (The difference in this method is that we don't compute the inverse for all x.)

We have

$\dfrac{x+2}{x+6} = -6$

$x + 2 = -6 (x + 6)$

$x + 2 = -6x - 36$

$7x = -38$

$\implies x = \boxed{-\dfrac{38}7}$

8 0

3 years ago

Which of the following rational functions is graphed below?

Volgvan

Answer:

OB. FUX) =(x+6)*x+6) that is the answer

6 0

3 years ago

Evaluate the expression<br> 7^0

Marysya12 [62]

Answer:

Step-by-step explanation:

Any number put to the 0 power is equal to 1.

Does that help?

3 0

3 years ago

Need help finding intervals where the function is decreasing.

umka21 [38]

$f(x)=-5x-5\sin x\implies f'(x)=-5-5\cos x$

$f$ is decreasing on some interval $(a,b)$ if $f'(x)$ for all $x\in(a,b)$ . Similarly, $f$ is increasing on $(a,b)$ if $f'(x)>0$ for all $x\in(a,b)$ .