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Sati [7]
3 years ago
15

Which statement is correct about y = cos^–1 x?

Mathematics
1 answer:
Maurinko [17]3 years ago
5 0

Answer:

A) If the domain of y=cos(x) is restricted to [0, π], y=cos^-1(x) is a function.

Step-by-step explanation:

In order for the inverse function to be a function, the original must pass the horizontal line test: a horizontal line must intersect the function in only one place.

As you can see from the attached graph, restricting the cosine function to the domain [0, π] allows it to pass the horizontal line test, so its inverse will be a function.

__

Restricting the domain to [-π/2, π/2] does not limit cos(x) to something that will pass the horizontal line test.

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Consider the exponential function: f(x) = 3(Five-fourths) Superscript x
gizmo_the_mogwai [7]

Answer: Initial Value: 3 Base: 5/4 Domain: (-infinity, infinity) Range: (0, infinity)  

Step-by-step explanation:

Function: y = 3(\frac{5}{4} )^{x}

3 0
3 years ago
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Fiesta28 [93]
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3 years ago
F(x)=6x-18 sub in f(x/3), f(x)/3
arlik [135]

These are two separate problems: in the first we will have to substitute in a new value for x into the original equation and in the second we will manipulate the preexisting equation for f(x).

To begin, we will sub in f(x/3). To do this, we will substitute each variable x in the equation (in this case there is only one) with x/3, and then simplify the resulting equation.

f(x) = 6x - 18

f(x/3) = 6(x/3) - 18

To simplify, we should distribute the 6 on the right side of the equation.

f(x/3) = 6x/3 - 18

Now, we can divide the first term on the right side to finalize our simplification.

f(x/3) = 2x -18

Secondly, we are asked to find f(x)/3. To do this, we will take our original value for f(x), and then simplify divide that entire function by 3.

f(x) = 6x - 18

f(x)/3 = (6x-18)/3

This means that we must divide each term of the binomial by 3, so we are really computing

f(x)/3 = 6x/3 - 18/3

We can simplify by dividing both of the terms.

f(x)/3 = 2x - 6

Therefore, your answer is that f(x/3) = 2x - 18, but f(x)/3 = 2x - 6. It is important to recognize that these are two similar, yet different, answers.

Hope this helps!


8 0
3 years ago
Which must be true?
malfutka [58]

Answer:

the answer is number three

Step-by-step explanation:

7 0
4 years ago
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alexira [117]

Answer:

y=3x-4

Step-by-step explanation:

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3 years ago
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