MATH 21A Midterm: MATH 20 Harvard 2006Spring20 Midterm II sol
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Rules: this is a one-hour exam, calculators are not allowed, unless otherwise stated, show all of your work. Full credit may not be given for an answer alone: you may use the backs of the pages or the extra pages for scratch work. Do not unstaple or remove pages as they can be lost in the grading process: please do not put your name on any page besides the rst page. If you like, you may put your id number on the top of each page you write on. Hints: read the entire exam to scan for obvious typos or questions you might have, budget your time so that you don"t run out, problems may stretch across several pages, relax and do well! Students who, for whatever reason, submit work not their own will ordinarily be required to withdraw from the college. Find the reduced row echelon form of a.
