Cahier d'Hyper-Textes de MATHÉMATIQUES de 1ère ES Option 2007-2008
jml@ecole-alsacienne.org


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February [1]
[Last up-dated  21/02/08]
Date
Activities / Objectives
Assignments / H.W.
Observations
References

Thursday


February

14

4:00-5:00 p.m.
Introduction to this class
objectives work on word problems with mathematical solutions.

First set of exercises from

"The Sam Loyd's problems"
Try some more of the
Sam Loyd's
problems
SM1
Sheet # 1

Sam Loyd
Thursday

February

21

4:00-5:00 p.m.
Second set of exercises from

"The Sam Loyd's problems (2)"

1°) Mother's jam puzzle
2°) Find two numbers a and b such that
      a + b = y and a.b = y
=> problem refers to the general problem of
finding two numbers of which the sum and the product are given.
e.g. a+b = S and a.b = P
=> Solve the equation a(S-a)=P
   or  a2 - S.a + P = 0
e.g. 
a2 - 10a + 16 = 0
by completing the square :
   (a - 5)
2 - 25 +16 = 0
   
(a - 5)2 = 9
    a - 5 = 3 or
   a - 5 = -3
 so that a = 8 (and b = 2) or
a = 2 (and b = 8)
SM6

Try to complete this problem
for March 13 th
SM5
Sheet # 2
Winter break
from February 23rd to March 10