Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Philadelphia University Faculty Of Science Dep. of Basic Science and Math Business Mathematics (250105), First semester First exam Student Name : ---------------------Student Number : -------------------- Date & Time: 19/11/2012-50 Min Form : A ---------------------------------------------------------------------------------------------------------------------------------- Q1 : Choose the correct answer: a) 4 (12 points) 1. The Slope of the Line –x+4y=5 is b) -4 c) -1/4 2. Make x the subject of the formula y=8/(6x+7) a) x=(-8+7y)/6y b) x=(8-7y)/6y c) x=(6y+7)/8y d) 1/4 d) x=(8-6y)/7y 3. The set of solution of the equation x2+2x-3=0 is a) {2,3} b) {-3,1} c) {-1,3} d) {-1,1} 4. Which of the following is increasing function a) 2x-y=7 b) y+7x=8 c) -2y-10x=6 d) 2-3y=8x 5. The inverse of the function f(x)=2x/(x+3) is a) f-1(x)=3x/(2-x) b) f-1(x)=(x+3)/2x c) f-1(x)=2x/(3-x) d) f-1(x)=2x/(x+3) 6. The minimum point of the function f(x)=2x2-4x+1 is a) Doesn’t exist b) (1,1) c) (1,-1) d) (2,1) 7. Solve the inequality 3x+4 ≤ 5x+2 a) (-∞,-1/4] b) (-∞,-1/4) c) [1,∞] d) (1,∞) 8. Solve │2x+3│=7 a) {-5,2} b) {-2,5} d) {-7,3} c) {-3,7} Q2 : The demand and supply functions of a good are given by P=-3QD+40, P=(1/3)QS+10 respectively (4 points) Find the equilibrium point if the government imposes a fixed tax of $5 on each good. Q3 : If the fixed cost of agood is 3 ,the variable cost per unit is 2 and the demand function is P=26-6Q, find Q that maximize the profit (4 points)