Today,

*Dr.A discussed the Quadratic,Absolute Value and Rational Inequalities.*

*Hmm...before that Dr.A explained the equation*

*again,Camille perfectly explained it last day(similar thing)*

*if you want more info... or practice about Quadratic Inequalities ,just click the links below....*

http://www.resources.mei.org.uk/sample/files/ascai2.htmlurces.mei.org.uk/sample/files/ascai2.html

http://www.algebra-online.com/quadratic-inequalities-1.htm

l*ets proceed to the critical numbers (where the function is undefined)....Rational Inequalities*

*ex..*

*x-1/(x-2)(x+3)<>*

*How many critical numbers are there in that equation?*

*Ans..*

*3 critical numbers (1,2,-3)*

*After we identified the Critical numbers were now ready to Graph it on the number line...*

Decide which intervals include numbers that make x-1/(x-2)(x+3) negative by substituting any number .......

http://www.purplemath.com/modules/ineqrtnl.htm

let's try -4

just subtitute it to the equation x-1/(x-2)(x+3)

-4-1/(-4-2)(-4+3)===-5/6(negative)

try 0.....(positive)

try 3(positive)

the only number that satisfy the given inequality (first one) .....therfore the answer is...

(-infinity,-3),(1,2)

http://www.purplemath.com/modules/ineqrtnl.htm

Absolute value inequalities

lets solve this equation:

/x/<3

we are looking for those real numbers x whose distance from the origin is less than 3 units.

(-3,0] [0,3)

## 1 comment:

nice blog kim.....

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