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Olenka [21]
2 years ago
14

Find the slope of the curve y=2/x at x=a.​

Mathematics
1 answer:
Degger [83]2 years ago
6 0

Answer:

  • We are given:- y=2/x
  • We need to find the slope of the curve at x=a.

Step-by-step explanation:

Solution,

We use the slope formula, setting x=a :

\displaystyle{{{{ \lim_{h \to0}}}} \frac{ \frac{2}{x + h}  -  \frac{2}{x} }{h}  =   \lim_{h \to0}  \frac{ \frac{2}{a + h}  -  \frac{2}{a} }{h} }

\displaystyle{ \lim_{h \to0} \frac{ \frac{2a - 2(a + h)}{a(a + h)} }{h}  =  \displaystyle{ \lim_{h \to0} \frac{2a - 2(a + h)}{ha(a + h)}  }}

\displaystyle{ \lim_{h \to0} \frac{2a - 2a - 2h}{ha(a + h)}  =  \displaystyle{ \lim_{h \to0}  \frac{ - 2h}{ha(a + h)} }}

\displaystyle{ \lim_{h \to0}  \frac{ - 2}{a(a + h)}  =  -  \frac{  2}{ {a}^{2} } }

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Devon wants to write an equation for a line that passes through 2 of the data points he has collected. The points are (8, 5) and
melamori03 [73]
Use slope formula to find slope <span><span><span>−9−5</span><span>−/12−8</span></span>=<span><span>−14/</span><span>−20</span></span>=<span>7/10</span></span> 7/10 = m = slope  
y= mx + b
y= (7/10)x + b
(8,5)
(5) = (7/10)(8) + b
b = -3/5

So.... <span>y=(<span>7/10)</span>x −<span>35

</span></span> multiply by 10

<span>10y=7x−6</span><span> --> -7x + 10y = -6
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6 0
3 years ago
Read 2 more answers
What is the slope of a line perpendicular to the line whose equation is 6x+2y=−32. Fully simplify your answer.
Reika [66]

The slope of the line that is perpendicular to 6x + 2y = -32 is: 1/3.

<h3>What is the Slope of Perpendicular Lines?</h3>

The slope of two lines that are perpendicular to each other will always have a product that is equal to -1, which means that their slopes are negative reciprocals to each other.

Rewrite 6x + 2y = -32 in slope-intercept form:

2y = -6x - 32

2y/2 = -6x/2 - 32/2

y = -3x - 16

The slope is -3. Negative reciprocal of -3 is 1/3.

Therefore, the slope of the perpendicular line would be: 1/3.

Learn more about the slope of perpendicular lines on:

brainly.com/question/1362601

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5 0
1 year ago
Here is a list of spelling-test results.Calculate the mean.14,19,19,20,16,18,15,17,12
makvit [3.9K]

To find the mean (average), we first need to add up all the test scores (14 + 19 + 19 + 20 + 16 + 18 + 15 + 17 + 12 = 150). Then, we need to divide that number (150) by the number of numbers in the data set (9 in this case). So the mean of these test scores is about 16.6666666667.

4 0
3 years ago
Write an equation of the line through each pair of points in slope-intercept form.
ASHA 777 [7]

Answer:

see below

Step-by-step explanation:

a) (– 3, –2) and (–3, 4)

First you want to find the slope of the line that passes through these points. To find the slope of the line, we use the slope formula: (y₂ - y₁) / (x₂ - x₁)

Plug in these values:

(4 - (-2) / (-3 - (-3))

Simplify the parentheses.

= (4 + 2) / (-3 + 3)

Simplify the fraction.

(6) / (0)

= undefined

If your slope is undefined, it is a vertical line. The equation of a vertical line is x = #.

In this case, the x-coordinate for both points is -3.

Therefore, your equation is x = -3.

b) (3, 2) and (–4, –5)

First you want to find the slope of the line that passes through these points. To find the slope of the line, we use the slope formula: (y₂ - y₁) / (x₂ - x₁)

Plug in these values:

(-5 - 2) / (-4 - 3)

Simplify the parentheses.

= (-7) / (-7)

Simplify the fraction.

-7/-7

= 1

This is your slope. Plug this value into the standard slope-intercept equation of y = mx + b.

y = 1x + b or y = x + b

To find b, we want to plug in a value that we know is on this line: in this case, I will use the first point (3, 2). Plug in the x and y values into the x and y of the standard equation.

2 = 1(3) + b

To find b, multiply the slope and the input of x(3)

2 = 3 + b

Now, subtract 3 from both sides to isolate b.

-1 = b

Plug this into your standard equation.

y = x - 1

This is your equation.

Check this by plugging in the other point you have not checked yet (-4, -5).

y = 1x - 1

-5 = 1(-4) - 1

-5 = -4 - 1

-5 = -5

Your equation is correct.

Hope this helps!

7 0
3 years ago
This is due in 10 minutes help!!!!!
Paul [167]

Answer:

option 1

<h3>10</h3>

Step-by-step explanation:

using distance formula

=> root{ ( x2 - x1)² + (y2-y1)²}

=> root {(-5-1)² + (2+6)²}

=> root {(-6)² + (8)²}

=> root {36 + 64}

=> root {100}

=> 10 units

3 0
3 years ago
Read 2 more answers
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