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Serjik [45]
3 years ago
8

Brian wants to conduct an online search using a certain phrase he intends to use the word books that belong to the 1800's in his

search how should he use the word that in his search?
Computers and Technology
1 answer:
Andrews [41]3 years ago
7 0

Answer:

Use quotation marks (" ")

Explanation:

It depends on the search engine. For Google, you need to put the phrase inside of quotation (" ") marks. It also works for DogPile and Bing. I can't confirm whether it works with any other search engines, but I can confirm that it works with these three engines.

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How many different messages can be transmitted in n microseconds using three different signals if one signal requires 1 microsec
SIZIF [17.4K]

Answer:

a_{n} = 2/3 . 2^n + 1/3 . (-1)^n

Explanation:

Let a_{n} represents number of the message that can transmitted in <em>n </em>microsecond using three of different signals.

One signal requires one microsecond for transmittal: a_{n}-1

Another signal requires two microseconds for transmittal: a_{n}-2

The last signal requires two microseconds for transmittal: a_{n}-2

a_{n}= a_{n-1} + a_{n-2} + a_{n-2} = a_{n-1} + 2a_{n-2}, n ≥  2

In 0 microseconds. exactly 1 message can be sent: the empty message.

a_{0}= 1

In 1 microsecond. exactly 1 message can be sent (using the one signal of one  microseconds:

a_{0}= 1

2- Roots Characteristic equation

Let a_{n} = r^2, a_{n-1}=r and a_{n-2}= 1

r^2 = r+2

r^2 - r - 2 =0                 Subtract r+6 from each side

(r - 2)(n+1)=0                  Factorize

r - 2 = 0 or r +1 = 0       Zero product property

r = 2 or r = -1                 Solve each equation

Solution recurrence relation

The solution of the recurrence relation is then of the form a_{1} = a_{1 r^n 1} + a_{2 r^n 2} with r_{1} and r_{2} the roots of the characteristic equation.

a_{n} =a_{1} . 2^n + a_{2}.(-1)"

Initial conditions :

1 = a_{0} = a_{1} + a_{2}

1 = a_{1} = 2a_{1} - a_{2}

Add the previous two equations

2 = 3a_{1}

2/3 = a_{1}

Determine a_{2} from 1 = a_{1} + a_{2} and a_{1} = 2/3

a_{2} = 1 - a_{1} = 1 - 2 / 3 = 1/3

Thus, the solution of recursion relation is a_{n} = 2/3 . 2^n + 1/3 . (-1)^n

6 0
3 years ago
What output will the look up formula below produce in relation to the following table?
noname [10]

Answer:

The VLookup checks a value inside a table through matching over the 1st column.

Lookup a value in a table by matching on the first column and the matched value is returned from the table.

Explanation:

The formula for the VLOOKUP is

=VLOOKUP (value to be matched in the first column, table from which the value will be looked for, col_index is the column inside the table from where the value is fetched, [range_lookup] is true for the approximate match, and false for exact match)

5 0
2 years ago
What is the purpose of external firewalls? to prevent users from accessing sensitive human resource or financial data to limit a
ziro4ka [17]
<span>keep out unauthorized internet users from intranet networks

All firewalls are used to control the traffic between networks to only allowed traffic.
</span>
3 0
3 years ago
the actual use and implementation of computer started after third generation justify this statement in your own words.​
cestrela7 [59]

Answer:

BLACK LIVES DONT MATTER

Explanation:

6 0
2 years ago
Calculating mean for even number and use while loop<br>pleas help me ​
vladimir2022 [97]

Answer:

Here is my answer in Javascript

num = 0;   // Use to calcate the even numbers

loop = 10; // Use for the highest even number that will be calcated for

index = loop/2; // Calcate the size of the array based upon how many loops their

let arr = [index]; //Create array to store the even numbers

let i = 0; // Use to keep track of which on what number in the while loop we are on  

let total = 0; //Used to add up all of the even numbers

let mean = 0; //Used to calcate the mean of all even numbers

do {

 i = i + 1; //Keep track of what loop we are on

 num = num + 2; //Used to calcate the even number

 arr.push(num); //Push the num into a array

 total = total + arr[i]; //Calcate the total of the array

 mean = total / i; //Calcate the mean

}

while (num != loop);

//Output the result

console.log(mean);

8 0
2 years ago
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