8/7/2019 LBYECO1 PSET1

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 LBYECO1

Problem Set #1Term 3, 2010-201107 February 2011

(Reminder: Deadline is on 14 February 2011 during class time. Print your answers on a scratch

paper.)

I.  Simplify the following:a)  x4.x5 b)  x7.x-3

c)  x-2.x-4

d) e)  (x2)5 

II.  Perform the indicated operations:

a)  (2x+9)(3x-8)b)  (6x-4y)(3x-5y)c)  (3x-7)2 d)  (x+y)(x-y)e)  Find the factors of the following

(1) 20x3-45x(2) x2-25(3) 12xy+25-4x2-9y2 (4) x2y2-a2b2 (5) 12x3-27xy2 

(6) 81-(2k+z)

2

 

III. Find the limit of the following:a) b) c) 

IV. Problem Solvinga)  Find the equilibrium price and quantity for the following markets:

(1) Qs=-20+3P (3) Qs+32-7P=0

Qd=220-2P Qd-128+9P=0(2) Qs=-45+8P (4) 13P-Qs=27

Qd=125-2P Qd+4P-24=0b)