Solution Midterm 1 (v2)

Solution Midterm 1 (v2) - Math 3 Midterm 1(version 2...

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Unformatted text preview: Math 3 Midterm 1 (version 2) April 29, 2011 instructor : Nandini Bhattach-arya Use of books, notes and graphing utilities is not permitted on this exam. Show all your work to get partial credit. Your Name: - \3 Student id# ------- u u u _ — — — q n u.— _ Your TA and section time: ------------------------------------------------ -- Max Possible Your score Problem 1: 10 Problem 2: 15 Problem 3: 10 Problem 4: 20 Problem 5: 15 Problem 6: 15 Problem 7: 15 TOTAL: 1 00 1. (10 points) Give a decent sketch of the graph of the following functions. Please include all the information indicated and don’t forget to carefully graph the functions at those points. f(x)=—x2w2x+3 "W; I K (mflxfi “Mu-wefi ’2 13 2“ Coordinates of the vertex yam-Q a- By completing the square: 2. (15 points) a) Let f(x)=\/x2+3x—4. Find the domain of f(x). "yik’éx—«ifi :3 g I' w“ ‘“ ’ ’ —« J J. '= ‘ z W “E” “"" ' T44?» A I H_._M “Xi”??? Wm§ flea—.1 4?. b) Let f(x)=x2—x and g(x)=1—2x. Compute each of the following: i) (f—gxx) 3 0) Give a reason why each of the following graph can not represent a polynomial function that has the highest term 2x5. ——“:- i. ' timer-{@1254}; WURJ‘E, _ 3 a inlaid” Mtge“ alg- w M “Mm” _ ea...” «wflwxfflw H .i f i I l ,_ 5 \l 5”?“ gainfuiik! J @52/ Sb’vxfifit‘r’i’irw 3. (10 points) Find the resultant function and its graph obtained by following the transformations applied to the graph of y=—1—,X>0 given E x in the following order: i a) Reflected about the x—axis. “\ ’ Ml B >6 #0 y M a—l 4. (20 points) Assume you are given the rational function f(x)=x2+8x+7 8x2 + 8x Hint: Keep track lof your domain Find the following: a) The y—intercept. r W a, i: J... ., ' a” K fl Q '1. LE? -MWQE‘} XIV»,th b) The x-intercept(s); % «w “d “5‘ Q flxfifi M in . N) LE? M {I ME) (1" J c) The equation of the vertical asymptoteg) 4% J ~ d) The equation of the horizontal asymptote (if any): e) Does the horizontal asymptote ever crosses the graph? 5. (15 points) The perimeter of a rectangle is 12m. a) Draw the rectangle labeling all sides and the diagonal. M! P ___V_-mm_.. it La” 1:. E r . i Wol— b) Write an equation that relates the two sides of the rectangle and the diagonal Hint: The Famous Theorem! ,3; F2“ 5 ../_._ x " {a 2:. A “is {£2 m ‘4 ' V. \ mi) 94 MK (.1. c) Find the dimensions for which the diagonal is as short as possible .. .1 1?,» ‘E p r, ‘- ' In“ 'lf‘mv'mm‘lifi, 'l’tm "‘fimzzrx r‘mwamvw a z. a 6. (15 points) Consider the function f(x)=e"+‘ a) Show that the function f(x) has an inverse. Hint: You can show this eitheraigebraically or grafiiically. Ki) {Eta/L (TR-hi» {Ed/g? “ - it V «a- r iii“ 0r" EM tea: 1. i i “a. fi‘ rm? i/ awfiiwmmem—g y u ,W.-.....___.m.m~----mu—-v--—-v WWW-“fl~~~m~wh_.~—-—..._......H____,,w._.—g- Ww_.,.._..w a" r www.mwtzw ffil (x) \ if; ‘g’ m a - w a t, ,2 I: ,1.‘ BC “:— {JVT m ' mar-"4"“ ’mJbM “FF “*— ‘Rwfl 0) Graph both f(x) and flea) on the same coordinate system and explain how the graphs are related. ft“ .2 i t P N, ___ WMW_MW_W” Mflmw Gfljflmww / 1i we “ 5 2 “‘3 f, d) Find the domain and range-0t f‘1(x) xiii/ht: You can figure out the domain and range of f"(x) knowing that of f(x). “2“ w “W “i it {m} 3“ fem/Mi) nefi.a\%mr‘fli \ i i- J ,4 \ Ji— {Aé‘i / w ‘ {fitmgwi ' ’ U4: (7" e53 ' I / 7 (15 points) Solve the following equations: a) loglooi2 + 36) 2 2 iii") {1o £2, “firm -‘ fiflg‘xw‘gwg / n. {\ C) 10g6x+10g6(x+1): 0 memm,» 1. ...
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