Yes 2,1 is a solution of this problem
Answer:
Option A is correct.
The domain of the g(x) is {x | x is a real number}
Step-by-step explanation:
The graph of the step function: g(x)=![-\left \lfloor x \right \rfloor +3](https://tex.z-dn.net/?f=-%5Cleft%20%5Clfloor%20x%20%5Cright%20%5Crfloor%20%2B3)
Floor function is defined as the function that gives the highest integer less than or equal to x.
The graph of function: g(x)=
where x is the independent variable as shown below;
Domain of any function is the complete set of possible values of the independent variable
Therefore, the domain of the function g(x) is the set of all real numbers or we can represent this as {x | x is a real number}.
The answer is 9. Thank you for your time
Let
![P(n):\ 1+2+\ldots+n = \dfrac{n(n+1)}{2}](https://tex.z-dn.net/?f=P%28n%29%3A%5C%201%2B2%2B%5Cldots%2Bn%20%3D%20%5Cdfrac%7Bn%28n%2B1%29%7D%7B2%7D)
In order to prove this by induction, we first need to prove the base case, i.e. prove that P(1) is true:
![P(1):\ 1 = \dfrac{1\cdot 2}{2}=1](https://tex.z-dn.net/?f=P%281%29%3A%5C%201%20%3D%20%5Cdfrac%7B1%5Ccdot%202%7D%7B2%7D%3D1)
So, the base case is ok. Now, we need to assume
and prove
.
states that
![P(n+1):\ 1+2+\ldots+n+(n+1) = \dfrac{(n+1)(n+2)}{2}=\dfrac{n^2+3n+2}{2}](https://tex.z-dn.net/?f=P%28n%2B1%29%3A%5C%201%2B2%2B%5Cldots%2Bn%2B%28n%2B1%29%20%3D%20%5Cdfrac%7B%28n%2B1%29%28n%2B2%29%7D%7B2%7D%3D%5Cdfrac%7Bn%5E2%2B3n%2B2%7D%7B2%7D)
Since we're assuming
, we can substitute the sum of the first n terms with their expression:
![\underbrace{1+2+\ldots+n}_{P(n)}+n+1 = \dfrac{n(n+1)}{2}+n+1=\dfrac{n(n+1)+2n+2}{2}=\dfrac{n^2+3n+2}{2}](https://tex.z-dn.net/?f=%5Cunderbrace%7B1%2B2%2B%5Cldots%2Bn%7D_%7BP%28n%29%7D%2Bn%2B1%20%3D%20%5Cdfrac%7Bn%28n%2B1%29%7D%7B2%7D%2Bn%2B1%3D%5Cdfrac%7Bn%28n%2B1%29%2B2n%2B2%7D%7B2%7D%3D%5Cdfrac%7Bn%5E2%2B3n%2B2%7D%7B2%7D)
Which terminates the proof, since we showed that
![P(n+1):\ 1+2+\ldots+n+(n+1) =\dfrac{n^2+3n+2}{2}](https://tex.z-dn.net/?f=P%28n%2B1%29%3A%5C%201%2B2%2B%5Cldots%2Bn%2B%28n%2B1%29%20%3D%5Cdfrac%7Bn%5E2%2B3n%2B2%7D%7B2%7D)
as required
Answer:
the answer is 108 ft²
Step-by-step explanation:
multiple 18 to 6