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melamori03 [73]
3 years ago
5

Bài 1: Cho hàm số y = (m-1)x + 2 (1)

Mathematics
1 answer:
blsea [12.9K]3 years ago
8 0

Answer:

i dont understand

Step-by-step explanation:

can some translate it

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A) Findi
Romashka [77]

Answer:

Part A)

\displaystyle \frac{dy}{dx}=-\frac{2xy+y^2}{x^2+2xy}

Part B)

\displaystyle y=-\frac{5}{8}x+\frac{9}{4}

Step-by-step explanation:

We have the equation:

\displaystyle x^2y+y^2x=6

Part A)

We want to find the derivative of our function, dy/dx.

So, we will take the derivative of both sides with respect to <em>x:</em>

<em />\displaystyle \frac{d}{dx}\Big[x^2y+y^2x\Big]=\frac{d}{dx}\big[6\big]<em />

The derivative of a constant is 0. We can expand the left:

\displaystyle \frac{d}{dx}\Big[x^2y\Big]+\frac{d}{dx}\Big[y^2x\Big]=0

Differentiate using the product rule:

\displaystyle \Big(\frac{d}{dx}\big[x^2\big]y+x^2\frac{d}{dx}\big[y\big]\Big)+\Big(\frac{d}{dx}\big[y^2\big]x+y^2\frac{d}{dx}\big[x\big]\Big)=0

Implicitly differentiate:

\displaystyle (2xy+x^2\frac{dy}{dx})+(2y\frac{dy}{dx}x+y^2)=0

Rearrange:

\displaystyle \Big(x^2\frac{dy}{dx}+2xy\frac{dy}{dx}\Big)+(2xy+y^2)=0

Isolate the dy/dx:

\displaystyle \frac{dy}{dx}(x^2+2xy)=-(2xy+y^2)

Hence, our derivative is:

\displaystyle \frac{dy}{dx}=-\frac{2xy+y^2}{x^2+2xy}

Part B)

We want to find the equation of the tangent line at (2, 1).

So, let's find the slope of the tangent line using the derivative. Substitute:

\displaystyle \frac{dy}{dx}_{(2,1)}=-\frac{2(2)(1)+(1)^2}{(2)^2+2(2)(1)}

Evaluate:

\displaystyle \frac{dy}{dx}_{(2,1)}=-\frac{4+1}{4+4}=-\frac{5}{8}

Then by the point-slope form:

y-y_1=m(x-x_1)

Yields:

\displaystyle y-1=-\frac{5}{8}(x-2)

Distribute:

\displaystyle y-1=-\frac{5}{8}x+\frac{5}{4}

Hence, our equation is:

\displaystyle y=-\frac{5}{8}x+\frac{9}{4}

5 0
2 years ago
Together, Emily and Charlotte have a total of 60 strawberries. Emily sats 4 times the amount that Charlotte eats. How many straw
ehidna [41]

Answer:

12

Step-by-step explanation:

Since Emily eats four times the amount that Charlotte eats, then Emily will eat: = (4 × x) = 4x. Therefore, Charlotte eats 12 strawberries

7 0
2 years ago
One half of a number p is at least 100
4vir4ik [10]

so then P could be any number greater then or equal to 200,hope this helps,please vote me brainliest


5 0
3 years ago
Read 2 more answers
What is the surface area means​
PIT_PIT [208]
Surface area is the sum of the areas of all faces (or surfaces) on a 3D shape.
3 0
3 years ago
Read 2 more answers
Make A the subject of the formula <br><br>r=<br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B%20%5Cfrac%7Ba%7D%7B3%7D%20%7D%20
DaniilM [7]

Answer:

Huh

Step-by-step explanation:

<h2>3-4=8+7-87+2Kknn<em><u>j</u></em><em><u>a</u></em><em><u>j</u></em><em><u>a</u></em><em><u>j</u></em><em><u>a</u></em><em><u>a</u></em><em><u>a</u></em></h2>

<em><u>T</u></em><em><u>H</u></em><em><u>A</u></em><em><u>N</u></em><em><u>G</u></em><em><u>I</u></em><em><u>N</u></em><em><u>A</u></em><em><u> </u></em><em><u>M</u></em><em><u>O</u></em><em><u> </u></em><em><u>T</u></em><em><u>A</u></em><em><u>N</u></em><em><u>O</u></em><em><u>N</u></em><em><u>G</u></em><em><u> </u></em><em><u>M</u></em><em><u>O</u></em><em><u> </u></em><em><u>S</u></em><em><u>A</u></em><em><u> </u></em><em><u>P</u></em><em><u>A</u></em><em><u>G</u></em><em><u>O</u></em><em><u>N</u></em><em><u>G</u></em><em><u> </u></em><em><u>V</u></em><em><u>O</u></em><em><u>V</u></em><em><u>O</u></em><em><u> </u></em><em><u>M</u></em><em><u>O</u></em><em><u> </u></em><em><u>V</u></em><em><u>O</u></em><em><u>V</u></em><em><u>O</u></em><em><u> </u></em><em><u>T</u></em><em><u>A</u></em><em><u>L</u></em><em><u>A</u></em><em><u>G</u></em><em><u>A</u></em><em><u> </u></em><em><u>1</u></em><em><u>V</u></em><em><u>1</u></em><em><u> </u></em><em><u>M</u></em><em><u>L</u></em>

3 0
2 years ago
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