Monday, October 30, 2006
posted by Eden at 6:36 PM
eg. 1:
√25a3b4
(25a3b4)1/2
251/2 (a3)1/2
5a3/2b4/2
5a3/2b2
eg. 2:
√36√6
√36*61/2
(36*61/2)1/2
361/2*61/4
64/4*61/4
=65/4
eg 3:
4√81xy5
(81xy5)1/4
(811/4)x1/4(y5)1/4
3x
1/4(y5/4)
* To solve an exponential equation, express both sides as powers with the same base and let the exponents equal each other.
eg. 9x+1= 27
32(x+1)= 33
2(x+1)=3
2x+2-2=3-2
2x=1
2 2
x= 1/2
42x+1=16-3
42x+1=42(-3)
2x+1=2(-3)
2x+1-1=-6-1
2X=-7
2 2
x=-7/2

this is what we did in class today and h/w is Ex #26 (omit 8,9,12,15 & 19)

and tomorrow is halloween and if you come to class with costume you'll get candy and we have quiz on // and I and on the number of sets .

tomorrows scribe is PAULO