3 years ago

What’s the value for x

2 answers:

8 0

X= -156 that is the real answer

5 0

x=624 is the answer
The solution is on the picture

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Zinaida [17]

Your answer would be C.
Have a good day!

3 0

3 years ago

Alik [6]

The derivative of $f(x,y,z)$ at a point $p_0=(x_0,y_0,z_0)$ in the direction of a vector $\vec a=a_x\,\vec\imath+a_y\,\vec\jmath+a_z\,\vec k$ is

$\nabla f(x_0,y_0,z_0)\cdot\dfrac{\vec a}{\|\vec a\|}$

We have

$f(x,y,z)=3e^x\cos(yz)\implies\nabla f(x,y,z)=3e^x\cos(yz)\,\vec\imath-3ze^x\sin(yz)\,\vec\jmath-3ye^x\sin(yz)\,\vec k$

and

$\vec a=-\vec\imath+2\,\vec\jmath+3\,\vec k\implies\|\vec a\|=\sqrt{(-1)^2+2^2+3^2}=\sqrt{14}$

Then the derivative at $p_0$ in the direction of $\vec a$ is

$3\,\vec\imath\cdot\dfrac{-\vec\imath+2\,\vec\jmath+3\,\vec k}{\sqrt{14}}=-\dfrac3{\sqrt{14}}$

3 0

3 years ago

bulgar [2K]

Answer:

Step-by-step explanation:

The ratios of the two shortest sides are different:

3/2 ≠ 5/4

so the quadrilaterals cannot be similar.

8 0

3 years ago

antoniya [11.8K]

Answer:16

Step-by-step explanation:

i just need to the points sorry dude

5 0

2 years ago

Mama L [17]

Hi,
The correct order should be -4.5, -3.9, -√2, -(5/25), 2/3

4 0

3 years ago