Answers/Hints for General Exercises
“It is not the answer that enlightens, but the question.
—EUGENE IONESCO DECOUVERTES (1909–1994)
Sometimes the questions are complicated and the answers are simple.
—DR. SEUSS (1904–1991)
Judge others by their questions rather than their ans wers.”
—FRANCOIS-MARIE AROUET VOLTAIRE (1694–1778)
General Exercises 1.1
1. x = (x1, x2, x3) = (2, 5, 7).
3. 
.
5. a21 = 2, a12 = 4.
7. No solutions other than (1, 3, 2).
9. y = 3.1 and x = −2.7.
11. The system is inconsistent. No solutions.
13. These lines meet at (3, −1).
15. 
17.
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