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tkhunny
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tkhunny
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Join Date
04-12-2005
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Yesterday
07:15 PM
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Yesterday,
11:28 AM
tkhunny
replied to a thread
Integration of 1/(-x+1) and -1/(x-1)
in
Calculus
Lacking additional information, \int \dfrac{1}{x} dx = \ln(|x|) + C Does this modify your musings?
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1 replies | 33 view(s)
02-19-2018,
04:35 PM
tkhunny
replied to a thread
Partial Fractions Concept check
in
Intermediate/Advanced Algebra
This is good thinking. If you were to use ONLY x^2, you would need bx+c. You are just splitting it out ahead of time. \dfrac{bx+c}{x^{2}} =...
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2 replies | 56 view(s)
02-19-2018,
01:50 PM
tkhunny
replied to a thread
Parabolic word problem.
in
Intermediate/Advanced Algebra
I'm certainly familiar with those, but I'm not seeing the application to analytic geometry :-)
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4 replies | 85 view(s)
02-19-2018,
11:19 AM
tkhunny
replied to a thread
Parabolic word problem.
in
Intermediate/Advanced Algebra
I was just thinking that a "Hyperbolic Word Problem" would be WAY more important than it really should be. I don't know about a parabolic word...
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4 replies | 85 view(s)
02-18-2018,
11:31 PM
tkhunny
replied to a thread
High School Level: Fun yet tricky triangle problem with diagram.
in
Geometry and Trig
Have you considered the Pytharogean Theorem?
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2 replies | 85 view(s)
02-18-2018,
11:29 PM
tkhunny
replied to a thread
Question about finding correct exam answers..
in
Advanced Math
I'm sorry, but we'll need two things. 1) A MUCH better translation, and 2) A MUCH better description of the problem.
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2 replies | 68 view(s)
02-18-2018,
11:27 PM
tkhunny
replied to a thread
Moivre's Formula
in
Intermediate/Advanced Algebra
Please state DeMoivre's Theorem and supply your thoughts on applying it to your situation.
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1 replies | 62 view(s)
02-16-2018,
10:53 AM
tkhunny
replied to a thread
(Help) Finding "x" in an equation: (x-1)3/4 = 64.
in
Beginning Algebra
What would you do if it were just 'x', rather than 'x-1'? Please demonstrate. Also, please clarify. Is that...
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2 replies | 140 view(s)
02-15-2018,
09:40 PM
tkhunny
replied to a thread
Expand expression sen(2pi/3)-cos (2pi/3) to get 2sen(pi/3)cos(pi/3)-1+2sen^2 (pi/3)
in
Geometry and Trig
Try these: http://www.purplemath.com/modules/idents.htm About half-way down, find "Double-Angle Identities".
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2 replies | 135 view(s)
02-15-2018,
10:47 AM
tkhunny
replied to a thread
y-coord of center of mass for region between f(x) = 2 sin(2x) on 0 <= x <= pi/2
in
Calculus
1) Don't post imgur links. Advertising overload is not acceptable. 2) Just exactly where did you attempt to calculate M_{x}. Please demonstrate...
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1 replies | 97 view(s)
02-15-2018,
07:56 AM
tkhunny
replied to a thread
Use integration by parts to evaluate integral: int[0,3] ln(x^2+9) dx
in
Calculus
Okay, what have you tried? Perhaps the basic formulation? Here's the Indefinite Version \int\ln\left(x^{2}+9\right)\;dx =...
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1 replies | 96 view(s)
02-15-2018,
12:10 AM
tkhunny
replied to a thread
Please explain why I got marks taken off in this limit question
in
Calculus
Personally, I would have taken points off for notation and spelling. It's "indeterminate". {your limit} = 0/0 is just terrible. Never say...
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2 replies | 111 view(s)
02-14-2018,
11:52 PM
tkhunny
replied to a thread
Probability problem dealing with the word INFINITY
in
Probability / Statistics
Way too many. Isn't this Without Replacement?
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3 replies | 172 view(s)
02-14-2018,
06:30 PM
tkhunny
replied to a thread
Probability problem dealing with the word INFINITY
in
Probability / Statistics
Have you examined exactly how many 3-letter "words" there are?
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3 replies | 172 view(s)
02-14-2018,
04:55 PM
tkhunny
replied to a thread
Racist Pepe the Frog Memes
in
Math Odds & Ends
No need to repeat the entire quote... I knew I liked you. Just another reason. :-)
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3 replies | 308 view(s)
02-14-2018,
12:37 PM
tkhunny
replied to a thread
Trigonometic Limit (tan x)^tan(x + Pi/4)
in
Geometry and Trig
That makes no sense. What does "check with the value" even mean? What "15 minutes"? You should have a sufficient background in the manipulation...
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6 replies | 226 view(s)
02-14-2018,
12:31 PM
tkhunny
replied to a thread
Trigonometic Limit (tan x)^tan(x + Pi/4)
in
Geometry and Trig
Have to disagree with this assessment. The OP has modified the expression with the neutral introduction of a logarithm and an exponent. This has...
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6 replies | 226 view(s)
02-13-2018,
06:19 PM
tkhunny
replied to a thread
Trigonometic Limit (tan x)^tan(x + Pi/4)
in
Geometry and Trig
You should not be doing that - unless you first go to the trouble to prove it continuous at that point. It's a limit. You don't get to arrive. You...
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6 replies | 226 view(s)
02-13-2018,
06:16 PM
tkhunny
replied to a thread
Help please: "A particular bus service is on time in 80% of journeys...."
in
Probability / Statistics
Well, it appears you should write your Null and Alternative hypotheses. Go! Remember that the Null Hypothesis tends to be status quo.
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1 replies | 77 view(s)
02-13-2018,
06:14 PM
tkhunny
replied to a thread
Differential equations - verification of homogenous solution
in
Differential Equations
I don't understand your need for values for these parameters. Why not just use them as they are? You have not done the exercise if you first...
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3 replies | 294 view(s)
02-13-2018,
06:10 PM
tkhunny
replied to a thread
Series, limits: sum[n=3] [n/(n+1) - (n+2)/(n+3)], lim[x->0^+] [(e^{2sqrt(x)} - 1)/...
in
Calculus
For the first, what does "n = 3" mean? Is there an upper limit? For the second, have you any tools? What have you been discussing in class? ...
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3 replies | 178 view(s)
02-13-2018,
06:01 PM
tkhunny
replied to a thread
Sequences (Discrete Math) of length 8 whose elements come from {A, B, C, D}
in
Intermediate/Advanced Algebra
Typically, one counts. For each part of the question, ask 8 sub questions: Which element(s) can appear in the first character of such a sequence?...
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1 replies | 87 view(s)
02-13-2018,
05:57 PM
tkhunny
replied to a thread
Finding X using a focal Date: Mr.D borrows $2000 now and $3000 in 4 months.
in
Finance/Business Math
You'll need to know how to calculate simple interest for a number of months. Please demonstrate any such calculation.
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2 replies | 282 view(s)
02-12-2018,
10:22 PM
tkhunny
replied to a thread
Moving a Triangles Center of Dilation
in
Geometry and Trig
You should have the Distance Formula in your pocket. I am getting at you answering the helpful hint/question question. If you answer it, we can...
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6 replies | 129 view(s)
02-12-2018,
08:56 PM
tkhunny
replied to a thread
Moving a Triangles Center of Dilation
in
Geometry and Trig
How far is each original point from (10,10)?
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6 replies | 129 view(s)
02-11-2018,
11:15 PM
tkhunny
replied to a thread
If a circle has twice the diameter, is it twice as large or 4 times as large
in
Geometry and Trig
If the Linear Measure ratio is 2:1, The Area Measure ratio will be 2^2:1^1 ==> 4:1, and The Volume Measure ratio will be 2^3:1^3 ==> 8:1 Count...
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3 replies | 157 view(s)
02-11-2018,
12:54 AM
tkhunny
replied to a thread
Trig equation: Find all soln's of 2cos(theta)+1=0 on the interval [0,2pi)
in
Geometry and Trig
This is incorrect. You have the correct answer. I'm guessing you just don't know what the answer software wants. Which is the greater of the...
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2 replies | 145 view(s)
02-11-2018,
12:45 AM
tkhunny
replied to a thread
Solving Pythagoras Theorem eqn a^2 + (1.3a)^2 = c^2 for "a": possible?
in
Geometry and Trig
You'll need a square root.
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4 replies | 238 view(s)
02-11-2018,
12:44 AM
tkhunny
replied to a thread
Justify steps w/ property, definition, or operation: (3x + 10x) to x(3 + 10) to x(13)
in
Beginning Algebra
Both of these are examples of the Distributive Property of Multiplication over Addition.
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11 replies | 452 view(s)
02-11-2018,
12:43 AM
tkhunny
replied to a thread
Justify steps w/ property, definition, or operation: (3x + 10x) to x(3 + 10) to x(13)
in
Beginning Algebra
If you see multiplication and addition, it must be Distributive. The Distributive Property of Multiplication over addition. 3x + 10x = (3+10)x ...
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11 replies | 452 view(s)
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"Unique Answers Don't Care How You Find Them." - Many may have said it, but I hear it most from me.
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