MFE2-hw6 - Math for Econ II Written Assignment 6(28 points...

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Finite Mathematics and Applied Calculus
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Chapter 5 / Exercise 2
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Math for Econ II, Written Assignment 6 (28 points)Due Friday, March 28thNew York UniversityPlease write neat solutions for the problems below. Show all your work. If you only write the answer with no work,you will not be given any credit.Write your name and recitation section number.Staple your homework if you have multiple pages!1. (3 pts) Find all numbersxsuch thatx0-112x-13-201= 5.2. (4 pts) Find123410-124200400-3-6-9-12400111.3. (4 pts) There are 2×2 matricesAsuch thatA2=-I2. For example, ifA=0-110, thenA2=-I2.Is there a 3×3 matrixAsuch thatA2=-I3? If so, find such anA. If not, show no suchAexists.(hint: use the fact that ifXandYaren×nmatrices then|XY|=|X||Y|)4. Solve the following systems by finding the inverse of the coefficient matrix.
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Finite Mathematics and Applied Calculus
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Chapter 5 / Exercise 2
Finite Mathematics and Applied Calculus
Costenoble/Waner
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