All categories

2 years ago

Find element a13 of matrix A, if A=

Mathematics

1 answer:

astraxan [27]2 years ago

8 0

$\bf \begin{bmatrix} 2&-3&\boxed{4}\\ 5&0&-6\\ 7&2&-8 \end{bmatrix}\impliedby a_{1,3}\textit{ row 1, column 3}$

You might be interested in

A student takes an exam containing 18 true or false questions. If the student guesses, what is the probability that he will get

V125BC [204]

Use this formula.
and solution is:［（18！）/（6！×（18-6）！）］×（1/2）^6×（1-1/2）^（18-6）≈0.0781604
7.8%

3 0

2 years ago

Differentiating a Logarithmic Function in Exercise, find the derivative of the function. See Examples 1, 2, 3, and 4.

wlad13 [49]

Answer:

$\frac{dy}{dx}=\frac{x(1-2lnx)}{x^{4}}$

Step-by-step explanation:

To solve the question we refresh our knowledge of the quotient rule.

For a function f(x) express as a ratio of another functions u(x) and v(x) i.e

$f(x)=\frac{u(x)}{v(x)}\\$ , the derivative is express as

$\frac{df(x)}{dx}=\frac{v(x)\frac{du(x)}{dx}-u(x)\frac{dv(x)}{dx}}{v(x)^{2} }$

from $y=lnx/x^{2}$

we assign u(x)=lnx and v(x)=x^2

and the derivatives

$\frac{du(x)}{dx}=\frac{1}{x}\\\frac{dv(x)}{dx}=2x\\$ .

Note the expression used in determining the derivative of the logarithm function.it was obtain from the general expression of logarithm derivative i.e $y=lnx\\\frac{dy}{dx}=\frac{1}{x}$

If we substitute values into the quotient expression we arrive at

$\frac{dy}{dx}=\frac{(x^{2}*\frac{1}{x})-(2x*lnx)}{x^{4}}\\\frac{dy}{dx}=\frac{x-2xlnx}{x^{4}}\\\frac{dy}{dx}=\frac{x(1-2lnx)}{x^{4}}$

8 0

2 years ago

Find the slope and the y intercept<br> Y=1/3x + 2

Andrej [43]

Answer:

m = 1/3, b = 2

Step-by-step explanation:

The equation is already written is slope-intercept form, y = m x + b.

7 0

2 years ago

Solve for W. MUST SHOW WORK!!<br> -3W +27 = 6

Travka [436]

Answer:

W=7

Step-by-step explanation:

-3W+27=6

Subtract 27 from both sides to isolate the variable.

-3W=-21

Divide by -3 to solve for W

w=7

3 0

2 years ago

Read 2 more answers

25% of ____= 11<br> Helpppppo

LenaWriter [7]

Answer:44

Step-by-step explanation:11=1/4 of what?

11=1/4 of 44

5 0

2 years ago

Read 2 more answers