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#1 2008-03-12 20:26:14
- ilovealgebra
- Member
- Registered: 2006-10-02
- Posts: 40
functions
find the domain of
1/(sqrtx -2)
I think the answer is x≥0 x≠4 but book says x>2 can someone please help me out, show me an algebraic way to solve these types of problems=) thanks
"...nothing physical which sense-experience sets before our eyes, or which necessary demonstrations prove to us, ought to be called into question (much less condemned) upon the testimony of biblical passages."
-Galileo Galilei
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#2 2008-03-12 21:22:13
- mathsyperson
- Moderator
- Registered: 2005-06-22
- Posts: 4,900
Re: functions
I'm guessing the book must mean 1/√(x-2).
Your answer would be right if it was 1/[√(x)-2].
So it's the book's fault for not being clear enough. 
Why did the vector cross the road?
It wanted to be normal.
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#3 2008-03-12 21:57:31
- ilovealgebra
- Member
- Registered: 2006-10-02
- Posts: 40
Re: functions
omg yes! lol maths is so much easier whn u knw u gettin things right thanks a bunch
"...nothing physical which sense-experience sets before our eyes, or which necessary demonstrations prove to us, ought to be called into question (much less condemned) upon the testimony of biblical passages."
-Galileo Galilei
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