Solution Found!
Compute the products in Exercises 1–4 using (a)
Chapter 1, Problem 1E(choose chapter or problem)
Compute the products in Exercises 1–4 using (a) the definition, as in Example 1, and (b) the row–vector rule for computing Ax. If a product is undefined, explain why.
\(\left[\begin{array}{rr} -4 & 2 \\ 1 & 6 \\ 0 & 1 \end{array}\right]\left[\begin{array}{r} 3 \\ -2 \\ 7 \end{array}\right]\)
Questions & Answers
QUESTION:
Compute the products in Exercises 1–4 using (a) the definition, as in Example 1, and (b) the row–vector rule for computing Ax. If a product is undefined, explain why.
\(\left[\begin{array}{rr} -4 & 2 \\ 1 & 6 \\ 0 & 1 \end{array}\right]\left[\begin{array}{r} 3 \\ -2 \\ 7 \end{array}\right]\)
ANSWER:Solution
Step 1
In this problem we need to compute the product Ax.
Given:
To find: Ax
We know that
That is is defined only if the number of columns of A match with the number of entries in
.