MATH 157 Final: Math157-final-v1-key 1167

• School: Simon Fraser University
• Department: Mathematics
• Course: MATH 157
• Professor: All

Document Summary

Instructions: write your last name, given name(s), student number, and sfu email id in the box above, sign your name in the box provided. Print your infor- mation legibly, correctly, and using large font: this exam has 10 questions on 12 pages. [7] (b) let f (x) =( x2+4x 5 x+5. A if x 6= 5; if x = 5. Find all the values of a so that f (x) is continuous at x = 5 and show your work. Since lim x 5 f (x) = lim x 5 x2 + 4x 5 x + 5. = lim x 5 (x + 5)(x 1) x + 5. So f ( 5) = a = 6 = lim x 5. = lim x 5 f (x). (x 1) = 5 1 = 6. [10: let f (x) = x + 2.