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help with some questions (solving logarithmic equations)  TOPIC_SOLVED

hi, i'm trying to bone up on my pre-calc and calc for a placement exam in a couple weeks. the school gave me some guidance on review and one of the sites they reference is "calculus on the web" which is supported by temple univ. in the logarithmic equations section of their pre-calculus bo...
by trdert
on Tue Aug 04, 2009 1:29 pm
 
Forum: Advanced Algebra ("pre-calculus")
Topic: help with some questions (solving logarithmic equations)
Replies: 4
Views: 2243

Re: help with some questions (solving logarithmic equations)  TOPIC_SOLVED

awesome, thanks. so i think i understand the first two but for the last one i'm still hung up. put all the terms on one side and set equal to "0" but i'm getting hung up on the rational roots test. -2 is the constant and 1 is the leading coefficient. so that leaves a possible solution set ...
by trdert
on Tue Aug 04, 2009 7:17 pm
 
Forum: Advanced Algebra ("pre-calculus")
Topic: help with some questions (solving logarithmic equations)
Replies: 4
Views: 2243

finding limits with square roots in function  TOPIC_SOLVED

hi all, i've got a couple problems i'm working on that require you to find the limit of a function with square roots. i'm having some issues with it. if anyone could lend a hand on the following problem it would be most appreciated: lim x->2 (sqrt(2x)-x)/(x-2) i know i need to factor out x-2 but i d...
by trdert
on Wed Aug 05, 2009 8:47 pm
 
Forum: Calculus
Topic: finding limits with square roots in function
Replies: 3
Views: 9100

Re: help with some questions (solving logarithmic equations)  TOPIC_SOLVED

ah, logs aren't defined for negatives...
by trdert
on Wed Aug 05, 2009 8:49 pm
 
Forum: Advanced Algebra ("pre-calculus")
Topic: help with some questions (solving logarithmic equations)
Replies: 4
Views: 2243

Re: finding limits with square roots in function  TOPIC_SOLVED

fantastic, thanks! i'll review the whole multiplying by the conjugate thing also.
by trdert
on Wed Aug 05, 2009 11:31 pm
 
Forum: Calculus
Topic: finding limits with square roots in function
Replies: 3
Views: 9100

finding delta for limits: prove lim, x->2, x^2 equals 4  TOPIC_SOLVED

hi all, i'm working on some problems at calc on the web. The limit of x 2 as x approaches 2 is 4. That is, lim x -> 2 x 2 = 4 Let epsilon= 0.2. Find delta > 0 such that if | x - 2 | < delta then | x 2 - 4 | < 0.2 so far i've plugged f(x), L and epsilon into f(x)-L > epsilon to get: x 2 -4 < 1/5, and...
by trdert
on Thu Aug 06, 2009 4:05 pm
 
Forum: Calculus
Topic: finding delta for limits: prove lim, x->2, x^2 equals 4
Replies: 1
Views: 9398

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