Answer:
Let f be a function
a) f(n) = n²
b) f(n) = n/2
c) f(n) = 0
Explanation:
a) f(n) = n²
This function is one-to-one function because the square of two different or distinct natural numbers cannot be equal.
Let a and b are two elements both belong to N i.e. a ∈ N and b ∈ N. Then:
f(a) = f(b) ⇒ a² = b² ⇒ a = b
The function f(n)= n² is not an onto function because not every natural number is a square of a natural number. This means that there is no other natural number that can be squared to result in that natural number. For example 2 is a natural numbers but not a perfect square and also 24 is a natural number but not a perfect square.
b) f(n) = n/2
The above function example is an onto function because every natural number, let’s say n is a natural number that belongs to N, is the image of 2n. For example:
f(2n) = [2n/2] = n
The above function is not one-to-one function because there are certain different natural numbers that have the same value or image. For example:
When the value of n=1, then
n/2 = [1/2] = [0.5] = 1
When the value of n=2 then
n/2 = [2/2] = [1] = 1
c) f(n) = 0
The above function is neither one-to-one nor onto. In order to depict that a function is not one-to-one there should be two elements in N having same image and the above example is not one to one because every integer has the same image. The above function example is also not an onto function because every positive integer is not an image of any natural number.
Answer: Power P at distance 0.7 km is: 0.234 µW
Explanation:
We know that
inverse cube-power law.
Thus Power, P = c / d³
Substituting we have
15 µW = c / (175 m)³
c = (15 µW) x (175 m)³
Then finally Power value at 0.7 km.
Will be
P = c / d³
P = ((15 µW) x (175 m)³) / (700 m)³
= (15 µW) x (175 / 700)³
= (15 µW) x (0.25)³
=(15 µW) x (0.015625)
P = 0.234 µW
Answer:
The correct answer is Option(A) i.e., An SQL injection attack is being
attempted.
Explanation:
In this given question some information is missing and is not the complete question. The missing is given as :
SELECT * FROM and ‘1’ = ‘1’
Which of the following can the security administrator determine from this?
A. The SQL injection attacked is being attempted.
B. An Legitimated connections is being dropped.
C. The network scan are being done by the system.
D. An attack of XSS is being attempted.
Now, coming to the answer "The security administration sees that an SQL injection is attempted while it notices a lot of connection dropped and has replaced with the firewall and will be the possible issue flagged on it, SQL injection is a type of injection that possibly executes harmful or malicious statements and effects any website or web application".
Hence the correct answer is Option A.
Generally I'd recommend not buying one online, tends to be cheaper from a shop - and better used, although their are some risks with 2nd hand devices, I think the big price cut it worth it.
If you did want to buy online, maybe Amazon or Ebay?
30% i believe im not sure im trying to complete a challenge honestly lol
