An exclusion is a value for a variable in the numerator or denominator that will make either the numerator or denominator equal
2 answers:
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The characteristic of a Null Matrix is :
A)All elements are = 0
C)First row = 0
D)First Column = 0
<u>Step-by-step explanation:</u>
Here we have , to tell which of the following are the characteristic of the null matrix :
Null Matrix : A null matrix is a matrix whose every element is zero ! for Example - is a 3×3 matrix , i.e. 3 rows & 3 columns .
A)All elements are = 0
Yes, All elements of a Null matrix are equal to 0 .
B)All elements are negative
No , not even a single matrix entry is negative .
C)First row = 0
Yes, First row is equal to zero!
D)First Column = 0
Yes, First column is equal to zero!
We are given that 
.
Substitute x with 5-x, then the above equation becomes:
, that is
So, we have the following system of equations:
i)
ii)
multiply the first equation by -4, so that we eliminate f(5-x)'s
i)
ii)
adding the 2 equations side by side we have:
expanding the binomial, and collecting same terms we have:
dividing by -5:
dividing by 3:
Answer:
Substitute x with 5-x, then the above equation becomes:
So, we have the following system of equations:
i)
ii)
multiply the first equation by -4, so that we eliminate f(5-x)'s
i)
ii)
adding the 2 equations side by side we have:
expanding the binomial, and collecting same terms we have:
dividing by -5:
dividing by 3:
Answer:
6 runners, 3 medals, how many ways to give them? well, runner say 2 could get gold or not, bronze or not and silver or not, and so can any other runnner, and the order "does matter", it makes a distinction, thus, is a Permutation
