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Paul Klarreich

Available
I can answer questions in basic to advanced algebra (theory of equations, complex numbers), precalculus (functions, graphs, exponential, logarithmic, and trigonometric functions and identities), basic probability, and finite mathematics, including mathematical induction. I can also try (but not guarantee) to answer questions on Abstract Algebra -- groups, rings, etc. and Analysis -- sequences, limits, continuity. I won't understand specialized engineering or business jargon.

Janet Yang

U.S.
Available
I can answer questions in Algebra, Basic Math, Calculus, Differential Equations, Geometry, Number Theory, and Word Problems. I would not feel comfortable answering questions in Probability and Statistics or Topology because I have not studied these in depth.

randy patton

U.S.
Available
college mathematics, applied math, advanced calculus, complex analysis, linear and abstract algebra, probability theory, signal processing, undergraduate physics, physical oceanography

Ahmed Salami

Nigeria
Available
I can provide good answers to questions dealing in almost all of mathematics especially from A`Level downwards. I can as well help a good deal in Physics with most emphasis directed towards mechanics.

Sombra Shadow

U.S.
Available
I can answer most questions up through Calculus and some in Number Theory and Abstract Algebra.

Clyde Oliver

U.S.
Available
I can answer all questions up to, and including, graduate level mathematics. I am more likely to prefer questions beyond the level of calculus. I can answer any questions, from basic elementary number theory like how to prove the first three digits of powers of 2 repeat (they do, with period 100, starting at 8), all the way to advanced mathematics like proving Egorov's theorem or finding phase transitions in random networks.

Socrates

Maxed Out
I can answer any questions from the standard four semester Calulus sequence. Derivatives, partial derivatives, chain rule, single and multiple integrals, change of variable, sequences and series, vector integration (Green`s Theorem, Stokes, and Gauss) and applications. Pre-Calculus, Linear Algebra and Finite Math questions are also welcome.

Recent Answers

2016-07-27 Eigen Values:

I agree that eigenvalues and eigenvectors can be a bit of a mystery.    Iíve come to think of eigenvectors as representing the basic structure of a linear transformation (LT). A basic theorem of linear

2016-07-26 Ferris/Giant Wheel Electronic toy design.:

To view a few, just type, "Ferris Wheel," in the search box.  I not only answered this question, but answered so much more.  I'm very interested in them.  Perhaps that is because I constructed one out

2016-07-26 Amount Invested:

B = mA  C = A+B    By substitution, C = A + mA.  By the distributive rule, A + mA = A(1+m).  :::::  D = C+B  By substitution, D = A(m+1) + mA.  By the distributive rule, D = A(2m+1).    It is given that

2016-07-26 T square and Set square construction materials.:

I would not use rubber, for that would make the square two flexible.  If glass were used, the square would be too easily broken.  I can't really think of anyone who would be interested in a glass square

2016-07-26 Amount Invested:

"A, B, C, and D invest $s."  A+B+C+D = s    "B invests m times as much as A"  B = mA    "C invests as much as A and B combined"  C = A+B = A+(mA) = A(m+1)    "D invests as much as C and B combined"  D

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