Posted by **edward** on Thursday, April 4, 2013 at 10:55am.

a matrix X has a+b rows and a+2 columns while the matrix Y has b+1 rows and a+3 columns. both matrices XY and YX exist. find a and b. can you say XY and YX sre of same type? are they equal?

- maths -
**Vikas singh**, Friday, April 19, 2013 at 3:59am
[X]

a+b*a+3;

[Y]

b+1*a+3;

so,

a+2=b+1 ...1

a+b=a+3

a is cut so,

b=3,

now,

put b=3 in (1)

a+2=3+1

a=4-2

a=2

a=2 and b=3.

XX and YX are not of the same type .they are unequal.

## Answer this Question

## Related Questions

- Algebra - Need to get these checked-- 33. What is the area of a square with the ...
- linear algebra- check question - I just want to make sure my reasoning is ...
- Math - I have a few questions about T-Matrix. In excel, I am suppose to work ...
- linear(hw check) - determine if v1= [ 2 1 0] v2=[ -1 1 3] v3=[ 0 -1 6] spans the...
- algebra-det. - a) Suppose that B is an n กม n matrix, and k is a scalar. Give a ...
- science - 1 A ……... is a rectangular array of numbers that are ...
- Algebra 2 - Is it me or does this problem not make sense? (you can't solve it) 5...
- chemistry - Which of the following os a true statement about the periodic table...
- 3rd grade math - What strategy do you use if you draw an array of 5 columns with...
- Maths: Algebra Matrices Class 12th - matrix{{0, 1, -1}, {2, 1, 3}, {1, 1, 1}} ...