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2 years ago

Which represents all the values of x that make the rational expression 2x-4 over x-5 undefined?

Mathematics

2 answers:

julsineya [31]2 years ago

7 0

X=5 because the denominator can never equal zero or it will be undefined. and 5-5=0

quester [9]2 years ago

7 0

Answer:

x = 5

Step-by-step explanation:

The given rational expression is

$\dfrac{2x-4}{x-5}$

We need to find all the values of x that make the rational expression undefined.

The given expression is undefined if the value of denominator is equal to 0.

Equate the denominator equal to 0.

$x-5=0$

Add 5 on both sides.

$x-5+5=0+5$

$x=5$

It means the given expression is undefined for x=5. Therefore, the correct option is 2.

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3 years ago

Read 2 more answers

For the funtion f(x)= (x+7)^5, Find f^-1 (x)

quester [9]

Answer:

The inverse of function $f(x)= (x+7)^5$ is $\mathbf{f^{-1} (x)=\sqrt[5]{x}+7}$

Option A is correct option.

Step-by-step explanation:

For the function $f(x)= (x+7)^5$ , Find $f^{-1} (x)$

For finding inverse of x,

First let:

$y=(x+7)^5$

Now replace x with y and y with x

$x=(y+7)^5$

Now, solve for y

Taking 5th square root on both sides

$\sqrt[5]{x}=\sqrt[5]{(y+7)^5}\\\sqrt[5]{x}=y+7\\=> y+7=\sqrt[5]{x}\\y=\sqrt[5]{x}-7$

Now, replace y with $f^{-1} (x)$

$f^{-1} (x)=\sqrt[5]{x}+7$

So, the inverse of function $f(x)= (x+7)^5$ is $\mathbf{f^{-1} (x)=\sqrt[5]{x}+7}$

Option A is correct option.

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3 years ago

HELPPP circle theorems

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Answer:

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Step-by-step explanation:

We need the measure of < g.

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Also one of the base angles are equal to 62 degrees ( by The Tangent Chord theorem). In fact both base angles are 62 degrees because the triangles an isosceles.

So measure of angle g = 180 - 2(62)

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3 years ago

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murzikaleks [220]

Answer:

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Step-by-step explanation:

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