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Advanced Math/Questions
| Subject | Date Asked | Expert |
| Absolute value function. | 12/27/2011 | Paul Klarreich |
| Q: the function f(x)=/ax-1/ - /bx+2/ is such that f(-1/2)=1 and f(1/3) = -7/3. given that 0 is less ... A: Questioner: kwibisa Country: Luapula, Zambia Category: Advanced Math Private: No Subject: ... | ||
| integration | 12/25/2011 | Paul Klarreich |
| Q: what is the integration of inverse e^2x? and what is the integration of inverse sin 3x? thanks ... A: Questioner: Mella Country: Jawa Timur, Indonesia Category: Advanced Math Private: No Subject: ... | ||
| Matrix square root | 12/24/2011 | Paul Klarreich |
| Q: Sir,in my opinion it is possible that every square matrix can have a square root matrix having the ... A: Questioner: ASWIN Country: Kerala, India Category: Advanced Math Private: Yes <<<<<<<<<<<<<<<<<< ... | ||
| Sequence and divisibility | 12/24/2011 | Ahmed Salami |
| Q: The first term of an arithmetic sequence is 3p+5, where p is a positive integer. The last term is ... A: If the first term of an arithmetic sequence is 3p+5 and its common difference is 2, then the nth ... | ||
| Sequence and divisibility | 12/24/2011 | Scott A Wilson |
| Q: The first term of an arithmetic sequence is 3p+5, where p is a positive integer. The last term is ... A: The terms go from 3p+5 to 17p+17, and they are by 2, so take the last term minus the first term, ... | ||
| how to prove a rule of nth powers | 12/21/2011 | Scott A Wilson |
| Q: How does one prove that if the index is "nth", and under radicand is "a" to the nth power that this ... A: I'm not sure I understand what is being asked, so let me state it in my words. The radicand is the ... | ||
| Math Proofs | 12/20/2011 | Scott A Wilson |
| Q: Let A, B be sets. Prove: A - B= A intersection B if and only if A = empty set. A: Since A - B would be the set with elements that are in A but not in B, and A intersect B would be ... | ||
| math | 12/19/2011 | Scott A Wilson |
| Q: 13.0693 rounded to the nearest hundredth A: The number 1 is in the ten's position, the number 3 is in the one's position, the number 0 is in the ... | ||
| calculus - Advanced level mathematics | 12/19/2011 | Ahmed Salami |
| Q: Q> Find the area under the graph of y = 2(e^1-2x) from x = 0 to x = ln(2) . A: For y = 2e^(1-2x), the area from x = 0 to x = ln(2) is A = ∫2e^(1-2x) dx from x = 0 to ln(2) ... | ||
| Basic graph sketching | 12/19/2011 | Paul Klarreich |
| Q: Q> Find any stationary points of the graphs of: a> y = 2 - (e^x) b> y = 2(x^2) + ... A: Questioner:Anurag Country:Nepal Category:Advanced Math Private:Yes <<<<<<<<<<<<<< changed Subject: ... | ||
| subject of formula | 12/16/2011 | Sherry Wallin |
| Q: From the formula for the sum of a geometric progression(GP). S= a(r^n - 1)/r - 1 make "r" the ... A: I'm not 100% certain what you are trying to do. If what you are trying to do is solve for r it ... | ||
| Eigenvectors | 12/15/2011 | Paul Klarreich |
| Q: I'm a first year Science student from Ireland and I've been studying for my Algebra final. I've been ... A: Questioner: Adam Private: Yes Changed it to public Subject: Eigenvectors.HiFind the ... | ||
| Eigenvectors | 12/15/2011 | Paul Klarreich |
| Q: I'm a first year Science student from Ireland and I've been studying for my Algebra final. I've been ... A: Questioner: Adam Country: Wicklow, Ireland Category: Advanced Math Private: No Subject: ... | ||
| probability | 12/14/2011 | Sherry Wallin |
| Q: Drawing 3 cards from a 52 card deck, what is the probability/odd of: a)them all being red b) one of ... A: a) 4/52 * 3/51 * 48/50 = .0043433891 with the same reasoning as before. The first factor 4/52 is ... | ||
| probability | 12/13/2011 | Sherry Wallin |
| Q: Drawing 3 cards from a 52 card deck, what is the probability/odd of: a)them all being red b) one of ... A: There are 26 red cards out of 52 cards, so the probability of choosing one red is 26/52 = 1/2 After ... | ||
| Trigonometric identity | 12/11/2011 | Paul Klarreich |
| Q: prove that (cscA+cotA)/(cscA-cotA) = (1+2cosA+cos^2A)/(sin^2A) A: Questioner: Ashley Country: Ontario, Canada Category: Advanced Math Private: No Subject: Trig ... | ||
| Confusing Calculation | 12/8/2011 | Ahmed Salami |
| Q: How should this calculation be solved? (1/7)/ 15 X 21 = ? If I have calculated properly, I get two ... A: Since you have two mathematical operators the first one to use would be the division <b>D</b> ... | ||
| Confusing Calculation | 12/7/2011 | Ahmed Salami |
| Q: How should this calculation be solved? (1/7)/ 15 X 21 = ? If I have calculated properly, I get two ... A: Well, you can always use the <b>BODMAS</b> order of operations which in full is; <b>B</b> = Brackets ... | ||
| maths | 12/7/2011 | Sherry Wallin |
| Q: (a^1)+(a^2)+...+(a^n) how 2 solve this for a=3 and n=8 A: I am not sure what the question is, except that you will want to figure out what 3 + 3^2 + 3^3 ... | ||
| Pre-Algebra | 11/30/2011 | Sherry Wallin |
| Q: how do you solve this problem i don't get how you do it?! 8x+10=2x-8 A: Hailey~ 8x + 10 = 2x - 8 first you want to gather your terms with x on one side so lets -2x from ... | ||
| Math | 11/29/2011 | Scott A Wilson |
| Q: I need to find the rate of this table. The numbers are X:-4, 1, 5 Y:-3, 1, 4 Thanks A: The rate would appear to be x goes from -4 to 1 by adding 5, and from 1 to 5 by adding 4. For y, we ... | ||
| philosophy of numbers | 11/29/2011 | Scott A Wilson |
| Q: I am not a math major or student but I am very interested in math in general. Numbers are an ... A: I can't say why, but that's why I'm a math major. Math rules all make sense and they never change. ... | ||
| Probability discrete math | 11/28/2011 | Scott A Wilson |
| Q: How do you solve this question? i got the answer for it on the link but i'm not sure how you get ... A: I don't find that address. I will assume we have n couples. The number of ways to seat the men is ... | ||
| Maths Application Example ? | 11/28/2011 | Scott A Wilson |
| Q: The Above Attached Example of Children becomes which Maths application ? Multiplication Probability ... A: There is no e-mail address in this message, so I will type it out in the message for 3, 4, and 5 ... | ||
| Trig | 11/27/2011 | Sherry Wallin |
| Q: Find all the exact solutions (in radians) for the equation 3tan^2 alpha - 4 = tan alpha. A: Joe~ Substitute tan alpha with x, move everything to the left and get: 3x^2 - x - 4 = 0 now factor ... | ||
| Binomial expansion | 11/26/2011 | Paul Klarreich |
| Q: I am wondering if there is a closed form solution, involving logarithms perhaps, to the following ... A: Questioner: Jim Monahan Country: Massachusetts, United States Category: Advanced Math Private: No ... | ||
| Dividing a circle into 45 equal segments | 11/26/2011 | Scott A Wilson |
| Q: I wish to make a circular board with a diameter of 350mm and then divide this into 45 equal ... A: Since the diameter is suppose to be 350mm, the radius is 350/(2pi). This would make the radius ... | ||
| Maths Application Example ? | 11/25/2011 | Scott A Wilson |
| Q: The Above Attached Example of Children becomes which Maths application ? Multiplication Probability ... A: I have attached a file with the total number of ways of getting each case. The 1st column is the ... | ||
| Trig Confusion | 11/24/2011 | Ahmed Salami |
| Q: I'm in 6th grade and having some trouble with a trig problem(s) I was wondering if you could list ... A: Have you tried using the trigonometric method for an angle in a right triangle? A way to always ... | ||
| convergence of series | 11/22/2011 | Socrates |
| Q: How do you prove by comparison test that n!/(n^3) converges or diverges? A: Compare n!/n^3 to 1/n n!/n^3 > 1/n (n-1)!/n^2 > 1/n (n-1)!/n > 1 (n-2)! (n-1)/n > 1 Since ... | ||
| Trigonometry | 11/22/2011 | Scott A Wilson |
| Q: Evaluate 5i^-15 - 3i^9 + 2i^-19 A: To do this, first we convert the numbers from a + bi to c*sinA + d*cosA. Since i is where A = ... | ||
| Trig Identities | 11/21/2011 | Clyde Oliver |
| Q: I've been having some trouble with verifying trig identities. A question I found online that is ... A: The trick is to convert secants to cosines and work backwards (using reversible steps): ... | ||
| Equation? | 11/21/2011 | Sherry Wallin |
| Q: I’m looking to figure out an equation that can forecast sales. For example let’s say I have sales ... A: Tom~ There are a lot of things that will affect sales but in general if you have data for the ... | ||
| Equation? | 11/21/2011 | Scott A Wilson |
| Q: I’m looking to figure out an equation that can forecast sales. For example let’s say I have sales ... A: The best way to do it is to plot the graph and see if it looks linear or parabolic. However it is, ... | ||
| Precalculus Functions | 11/19/2011 | Scott A Wilson |
| Q: I'm really stumped on this question. Any help in isolating the equation would be really helpful. ... A: 30 cm is at rest; stretched down to 38; stretch is reduced b 3/4 each time it bounces. That sounds ... | ||
| Algebraic inequality | 11/18/2011 | Scott A Wilson |
| Q: Given that a > 0, b > 0, and c > 0, prove that a + b + c > 3abc implies a^2 + b^2 + c^2 > 3abc. A: This statement is false. If a = b = c = 1, this means that a² = b² = c² = 1, so a+b+c = 3, ... | ||
| Logarithmic equation | 11/18/2011 | Paul Klarreich |
| Q: I'm in a grade 12 math course and we are studying logarithmic equations. I can't quite figure out ... A: Questioner: Michelle Country: Prince Edward Island, Canada Category: Advanced Math Private: No ... | ||
| Equation? | 11/17/2011 | Scott A Wilson |
| Q: I’m looking to figure out an equation that can forecast sales. For example let’s say I have sales ... A: Do linear regression on the data 1 25,000 2 30,000 3 28,000 4 27,000 5 30,000 There are 5 points, ... | ||
| Equation? | 11/17/2011 | Sherry Wallin |
| Q: I’m looking to figure out an equation that can forecast sales. For example let’s say I have sales ... A: Tom~ Is this a statistics problem? When you say with a certain level of confidence it smacks of ... | ||
| trigonometric identities | 11/17/2011 | Scott A Wilson |
| Q: Can you help me with this task? cos(x+y)=1/5, cos(x-y)=1/5 ; tgx * tgy=? Please and thank you! A: I'm not sure what tgx or tgy mean. An answer to this question would be to say y=0 and cos(x)=1/5, ... | ||
Answers by Expert:
Scott A Wilson
Top Expert on this page
Expertise
I can answer any question in general math, arithetic, discret math, algebra, box problems, geometry, filling a tank with water, trigonometry, pre-calculus, linear algebra, complex mathematics, probability, statistics, and most of anything else that relates to math. I can even tell you it takes me over 2,000 steps to go a mile, but is that relevant?
Experience
Experience in the area; I have tutored people in the above areas of mathematics for almost two years in AllExperts.com. I have tutored people here and there in mathematics since before I received a BS degree almost 25 years ago. In just two more years, I received an MS degree as well, but more on that later.
I tutored at OSU in the math center for all six years I was there. Most students offering assistance were juniors, seniors, or graduate students. I was allowed to tutor as a freshman.
I tutored at Mathnasium for well over a year.
I worked at The Boeing Company for over 5 years.
I received an MS degreee in Mathematics from Oregon State Univeristy.
The classes I took were over 100 hours of upper division credits in mathematical courses such as
calculus, statistics, probabilty, linear algrebra, powers, linear regression, matrices, and more.
I graduated with honors in both my BS and MS degrees.
Past/Present Clients: College Students at Oregon State University, various math people since college,
over 7,500 people on the PC from the US and rest the world.
Publications
My master's paper was published in the OSU journal.
The subject of it was Numerical Analysis used in shock waves and rarefaction fans.
It dealt with discontinuities that arose over time.
They were solved using the Leap Frog method.
That method was used and improvements of it were shown.
The improvements were by Enquist-Osher, Godunov, and Lax-Wendroff.
Education/Credentials
Master of Science at OSU with high honors in mathematics.
Bachelor of Science at OSU with high honors in mathematical sciences.
This degree involved mathematics, statistics, and computer science.
I also took sophmore level physics and chemistry while I was attending college.
On the side I took raquetball, but that's still not relevant.
Awards and Honors
I earned high honors in both my BS degree and MS degree from Oregon State.
I was in near the top in most of my classes. In several classes in mathematics, I was first.
In a class of over 100 students, I was always one of the first ones to complete the test.
I graduated with well over 50 credits in upper division mathematics.
Past/Present Clients
My clients have been students at OSU, people nearby, friends with math questions,
and several people every day on the PC, and you're probably make one more.
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