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DiKsa [7]
3 years ago
6

Y=3x^2+6x-7/(x+1)^2 Show that dy/dx = 20/(x+1)^3

Mathematics
1 answer:
fredd [130]3 years ago
3 0
Apply the quotient rule  
d(uv)  =    v du/dx - u dv/dx
  dx           ----------------------
                         v^2

 du/dx  =  6x + 6
 dv/dx   =  2(x + 1)
 v^2 = (x + 1)^4   so we have

dy dx =  (x + 1)^2 .* (6x + 6) - (3x^2 + 6x - 7) * 2(x + 1)   /  (x + 1)^4

         =   (x + 1) [(6(x + 1)^2 - 2(3x^2 + 6x - 7) ]  / (x + 1)^4

         =  (x^2 + 12x +6 - 6x^2  - 12x + 14 ) / (x + 1)^3  

        =  20 / (x + 1)^3   Answer
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Bashir works in a weather station and has launched a weather ballon. The height of the baloon is 4 kilometers and it is 1 kilome
andrew-mc [135]

<u><em>Answer:</em></u>

(c) 4.1 km

<u><em>Explanation:</em></u>

We are given that the height of the balloon is 4 km and that it is 1 km away from the station.

Setting up the diagram that describes the given scenario, we would end up with a right-angled triangle as the one shown in the attached image

<u>where:</u>

height of the balloon = 4 km represents one side of the triangle

distance between the base of the balloon and the station = 1 km represents the other side

distance between the balloon and the station is the length we want to find and it represents the hypotenuse of the triangle.

<u>To get the length of the hypotenuse, we will use the Pythagorean theorem</u>

hypotenuse = +\sqrt{(side1)^2 + (side2)^2}

<u>Substitute with the givens:</u>

hypotenuse = +\sqrt{(4)^2 + (1)^2} = √17 ≈ 4.1 km

Hope this helps :)


3 0
3 years ago
How many solutions does this linear have y= 5x-1 -15x-3y=3?
musickatia [10]
-15x - 3y = 3

-15x - 3(5x-1) = 3 [input y]
-15x - 15x - 3 = 3 [distribute 3 over 5x and -1]
-30x - 3 = 3 [combine like terms]
-30x = 6 [add 3 to eliminate the negative]
x = \frac{6}{-30} [divide by -30 to get x alone]
x = \frac{1}{-5} [reduce the fraction]

Hopefully this is helpful enough to get you to your answer
4 0
3 years ago
Help me with out this one thanks!
zavuch27 [327]

Answer:

9.5

Step-by-step explanation:

It keeps repeating the line goes all the way up then it keeps going to 9 then to 9.5 in the middle of 9 so it means its in between 10 so its 9.5 to 9 then 9.5 it repeats so mostly the answer is 9.5

hope i helped

please mark me as brainliest please

7 0
3 years ago
CAN I PLEASE GET HELP ON THIS??
m_a_m_a [10]

Answer:

A

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
This does not make sense to me
solong [7]
To find area you have to multiply length x width. so to find your answer the equation should be 15/22 x 2/5
6 0
3 years ago
Read 2 more answers
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