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Karolina [17]
3 years ago
8

-1/2, -2, -8, -32 Is this geometric, arithmetic, or neither?

Mathematics
1 answer:
serg [7]3 years ago
4 0

Answer:

Neither

Step-by-step explanation:

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Find the directional derivative of f(x,y,z)=z3−x2yf(x,y,z)=z3−x2y at the point (−5,5,2)(−5,5,2) in the direction of the vector v
olga_2 [115]

We are given

f=z^3 -x^2y

Firstly, we can find gradient

so, we will find partial derivatives

f_x=0 -2xy

f_x=-2xy

f_y=0 -x^2

f_y=-x^2

f_z=3z^2

now, we can plug point (-5,5,2)

f_x=-2*-5*5=50

f_y=-(-5)^2=-25

f_z=3(2)^2=12

so, gradient will be

gradf=(50,-25,12)

now, we are given that

it is in direction of v=⟨−3,2,−4⟩

so, we will find it's unit vector

|v|=\sqrt{(-3)^2+(2)^2+(-4)^2}

|v|=\sqrt{29}

now, we can find unit vector

v'=(\frac{-3}{\sqrt{29} } , \frac{2}{\sqrt{29} } , \frac{-4}{\sqrt{29} })

now, we can find dot product to find direction of the vector

dir=(gradf) \cdot (v')

now, we can plug values

dir=(50,-25,12) \cdot (\frac{-3}{\sqrt{29} } , \frac{2}{\sqrt{29} } , \frac{-4}{\sqrt{29} })

dir=(-\frac{150}{\sqrt{29} } - \frac{50}{\sqrt{29} } - \frac{48}{\sqrt{29} })

dir=-\frac{248\sqrt{29}}{29}.............Answer



7 0
3 years ago
Read 2 more answers
Help..... me .......please..........ITS URGENT
Vikentia [17]

Answer: 115, 2645

(x= 115, y= 2645)

Step-by-step explanation:

There are two methods to this, which is using the graph with each x and y value, or substituting in values.

I would suggest looking at the graph first and then substituting values so you know the equation is being satisfied by the ordered pair.

In this case, one way to check it could look like this (substituting y value):

y = 23x

2645 = 23x

x = 2645÷23

x = 115

6 0
2 years ago
What is 25% as a decimal
Artist 52 [7]
25% as a fraction is 1/4 or 25/100 so as a decimal its 1/4 of 1 which is .25
3 0
3 years ago
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QUESTION IN PICTURE thx <3
Umnica [9.8K]

Answer:

7 1/9

Step-by-step explanation:

because I know i'm right

6 0
3 years ago
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I need help on this question
barxatty [35]
I believe this is pythag

15^2 x 11^2 = 27225

(square root) of 27225 = 165

165ft
6 0
3 years ago
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