Answer Happy

The matrix product AB is defined if and only if the number of columns of matrix A is equal to the number of rows of matrix B. T F 4. Let A and B be finite sets such that AnBØ. By the addition rule for sets, we have n(An B) = n(A) + n(B). TF 1. A system of linear equations can have exactly two solutions. TF 2. The level of production at which a firm neither makes a profit nor sustains a loss is called the break-even level of operation. TF 3. T T T T F 5. The number of combinations of n distinct objects taken n at a time is C(n,n) - nl. F 6. If a linear programming problem has a solution, then it must occur at a point on the border of the feasible set S. F 7. The objective functions of both the primal and dual problem attain the same optimal value. F 8. Simple interest is earned interest at an interest rate of r (in dollars) per year for t years that is computed on the original principal only. T TF F 9. A arithmetic progression is completely determined if the first term and the common difference are known. 10. The sum of the first n terms of a geometric sequence with first term a and common ratio r = 1 is given by Sn = (1-P)