MTH 421 Midterm: Midterm 2 Spring 2009
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Instructions: no calculators, books, notes, or electronic devices may be used during the exam, you have 50 minutes, there are 4 problems, some with multiple parts. Complete all problems, and write all solutions in the space provided on the exam: unless indicated otherwise, you may use any theorem proved in the lecture, or any theorem from single variable di erential calculus. When applying a theorem, you should explicitly verify that all necessary hypotheses are met: additional scratch paper is provided at the end of the exam. Total (50 points: determine whether each of the following statements is true or false. If a statement is false, provide a counterexample. (write out the word true or false completely! No proof or explanation is necessary if you answer true, and you don"t need to prove your proposed counterexample is a counterexample if you answer false. ) (a) let f : e rn rm be a continuous function.