Posted by **jen** on Monday, August 4, 2008 at 1:42am.

Let A be a 5 by 4 matris and suppose that the system Ax=b has a solution. Explain why the solution is unique if and only if the rank of A is 4.

I said that it is unique becaue the rank is equal to the number of columns.

Do you have a better explaination.

## Answer this Question

## Related Questions

- math - Find conditions on k that will make the following system of equations ...
- algebra - Consider the following system of inequalities: {(c-1)x^2+2cx+c+4<0...
- maths - Consider the following system of inequalities: {(c−1)x^2+2cx+c+4&#...
- algebra - Consider the following system of inequalities: {(c−1)x^2+2cx+c+4...
- MAths - Consider the following system of inequalities: (c−1)x^2+2cx+c+4&#...
- math - two systems of equations are giving below for each system choosethe best ...
- math - two systems of equations are given below for each system, choose the best...
- Math: matrices - If A and B are both square n x n matrices, If AB = I, prove BA...
- math,help!!!!! - Let A be a 2*3 coefficient matrix ;A a)If the system Ax=b is ...
- algebra - Which has a Unique solution, No solution, or infinitely many ...

More Related Questions