Eroxl's Notes
Midterm 1 - MATH 221 (2007T2)

Problem 1

Use row reduction to solve the following linear system

Problem 2

Let , , and . For what value(s) of is spanned by and .

Problem 3

Let and . Show that the equation does not have a solution for all possible , and describe the set of all for which does have a solution.

For any value of the system forms an inconsistent system, the set of all for which does have a solution must then take the form of .

Problem 4

Let be the linear transformation defined by

(a). Write the Matrix for

(b). Find All Vectors whose Image under is

There is no vector who's image is .

(c). Suppose is in the Range of . Find the Linear Equation Satisfied by , , and

For a solution to exist .

Problem 5

Decide whether the following statements are true or false, and justify your answer.

(a). The Equation Describes a line through Parallel to

False the equation describes a line through the point which is parallel to .

(b). The Columns of Any Matrix Are Linearly Dependent

True there are 5 vectors in , when the number of vectors is more than the space dimension they are always linearly dependent.