MATH21F09M1sol - MATH 21 NOVEMBER 2 2009 EXAM 1.2 Solutions Instructions Please turn OFF all cell phones iPods etc There are 5 questions worth a

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
MATH 21 NOVEMBER 2, 2009 EXAM 1.2 — Solutions Instructions Please turn OFF all cell phones, iPods, etc. . There are 5 questions worth a total of 42 points. 100%=40 points. Read all the questions before you begin. Answer the ones you find easiest first . Please write neatly and show all your work. No notes or books. No calculators! Take your time, and check your answers. Good Luck!!! NAME: Zarathustra Problem Score 1 /14 2 /10 3 /6 4 /8 5 /4 Total /40 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
MATH 21 EXAM 1 FALL 2009 (1) Consider the matrix M = 1 1 - 1 0 1 - 1 0 3 - 2 1 2 2 - 2 1 5 2 1 - 4 3 3 . a. (4 pts) Write down the system of equations whose augmented matrix is M . x 1 + x 2 - x 3 = 1 - x 1 + 3 x 3 - 2 x 4 = 1 2 x 1 + 2 x 2 - 2 x 3 + x 4 = 5 2 x 1 + x 2 - 4 x 3 + 3 x 4 = 3 b. (6 pts) Find the reduced row echelon form of M . M 1 0 - 3 0 - 7 0 1 2 0 8 0 0 0 1 3 0 0 0 0 0 . c.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/16/2010 for the course ECON 11 taught by Professor Yk during the Spring '10 term at University of California, Santa Cruz.

Page1 / 6

MATH21F09M1sol - MATH 21 NOVEMBER 2 2009 EXAM 1.2 Solutions Instructions Please turn OFF all cell phones iPods etc There are 5 questions worth a

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online