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Differential Equations

Mixed approximation vs. full approximation for a power series expansion
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Undergrad Mixed approximation vs. full approximation for a power series expansion
Undergrad Why Are These the Formulas for Derivatives and Logarithms?
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Undergrad Integration by parts when a limit is infinity.
  • Shinjo
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Graduate Why Doesn't the Second Derivative Work Starting with y^2-xy=2?
  • sjaguar13
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Graduate Can These Mathematical Proofs Determine the Limit of a Function?
  • semidevil
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Undergrad How Do Double Integrals and Polar Coordinates Relate to Symmetry Arguments?
  • jenc305
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Undergrad How do I Find the Derivative of sin(2x)?
  • SomeRandomGuy
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Undergrad Irrational + irrational = rational
  • tonebone10
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Graduate What are some vector calculus questions about gradient, divergence, and curl?
  • misogynisticfeminist
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Undergrad General term of the sequence, if it exists
  • relinquished™
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Undergrad Distance from the origin to the curve
  • physicsCU
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Graduate Finding Volume of a Bounded Cylinder with Double Integral
  • One-D
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Undergrad Can I Prove the Chain Rule with the Definition of a Total Differential?
  • Icebreaker
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Undergrad I with the following questions.
  • DLxX
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Undergrad Critical Points of f(x): -2x^3 + 39x^2 - 180x + 1
  • smith5029
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Graduate Proving Pn(x^2) as the 4n+2-nd Taylor Polynomial of sin(x^2) using Rn(x) Limits
  • trap
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Graduate Is There a Real Solution for a^n+b^n=c^n as n Approaches Infinity?
  • Icebreaker
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High School Is there an easier approach for solving trigonometric identities?
  • Dooh
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Undergrad Limit of Sum as n Approaches Infinity: 1/n * sqrt(1-i^2/n^2) = 0
  • mprm86
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Undergrad Integrals of Rational Functions
  • Kp0684
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Undergrad How can I factor a quartic equation without a calculator for the AIME?
  • p53ud0 dr34m5
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Undergrad Need help with maclaurin series question
  • Yura
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Undergrad Can l'Hôpital's Rule Help Determine the Limit of an Improper Integral?
  • trap
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Undergrad How do I calculate an integral with a square root in the denominator?
  • solkahns
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Undergrad Solving Integral with u=tan(x/2): Hints & Suggestions
  • chimera
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Graduate Integral Test for \sum^{\infty}_{n=2} \frac{1}{n(ln\;n)^{2}} - 0.01
  • 3.14159265358979
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Undergrad Discovering Global Extrema for f(x,y)=sin(x) + cos(y) on [0,2π]x[0,2π]
  • mathrocks
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8
High School The Mystery of the e Series: Uncovering Its Name
  • LENIN
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6
Undergrad Throwing an Object to Reach the Top of the Washington Monument
  • Dimented Visions
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Undergrad What is the limit of (e^x-1)/x as x approaches 0?
  • kidia
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Undergrad Proving Orthogonal Curves at Intersection Point
  • gokugreene
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6
Undergrad Why Pick Delta as 1 in Limits of Functions?
  • semidevil
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10
High School Grr, deleted line in Newton's Method program
  • Coldie
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20
Undergrad What is the Best Way to Determine x Given y in a Sine Wave Algorithm?
  • webamoeba
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Undergrad Help with change of variables please
  • ninjacookies
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High School Solución a Problema de Viga y Corredores
  • madin
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10
Undergrad Solve Sequence Problem: (2n-1)/(3n^2 +1), n= 1,2,3,...
  • Physicsisfun2005
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Who's done the most homework in shortest amount of time?
  • Jameson
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Undergrad How Many Centimeters of Wire Were Used Up? | Mu Alpha Theta Math Club Question"
  • Jameson
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Undergrad How do you determine which denominators to multiply in integrating fractions?
  • Juche
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6
Graduate Geom Series: Converge Radius 1, c Complex Num
  • spacediablo
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Undergrad Differentiating tanh: Step-by-Step Guide
  • .....
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Undergrad Yet another interesting integral
  • msmith12
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14
Graduate Proving Hodge Decomposition Theorem for Compact Riemannian Manifolds
  • Haelfix
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Undergrad Getting the Derivative of f(w) = ln[cos(w-1)]
  • dec1ble
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14
Graduate Is the Interior of A Equal to the Interior of the Closure of A?
  • PBRMEASAP
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Undergrad How do you find the indefinite integral of xsinx
  • laker88116
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Undergrad Why Does Summation Not Converge?
  • hola
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7
Undergrad Is Advanced Calculus I Really That Challenging?
  • TimNguyen
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9
Undergrad Explain how you can use these powers to define 3^( sqrt of 2 )
  • jai6638
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Graduate Integrate this without gauss theorem
  • TheDestroyer
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6
Undergrad Can I Integrate e^[1 / (1 + t)] dt Numerically?
  • irony of truth
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Undergrad What is the number e and how is it related to logarithms?
  • J7
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High School AP Calc: Finding Area of Polar Graphs without a Calculator
  • Jameson
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Graduate Is there a simpler way to write the cross product of curl?
  • Galileo
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Undergrad Double Integrals: Notation Question
  • Zurtex
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9
Undergrad Help with Integration Problem: \int \frac{\ x^2}{1+x^2} dx
  • trap
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Graduate How Do You Calculate Line Integrals and Center of Mass for Complex Shapes?
  • hytuoc
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Undergrad Implicit diff (2 var), error or what?
  • trancefishy
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Undergrad Problem on finding the second derivative.
  • jzq
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Undergrad Calculating Volume of Solid Using Cylindrical Shell Method
  • pattiecake
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High School Discovering Limits: Solving for x Approaching Zero from the Left
  • ashleyk
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Undergrad Need help on this curve-sketching problem.
  • jzq
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Undergrad Integrate (X/X+d)dX: Solve w/Substitution
  • funkwort
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Graduate Cylindrical and spherical coordinates
  • hytuoc
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Graduate Integrate csc2x ln(tanx) dx: Solutions & Suggestions
  • flying2000
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High School Solve x & y in sqrt(x-1) + sqrt(y-2) = sqrt5
  • mohlam12
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Graduate Compactness contradiction physics
  • mansi
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6
Graduate Suppose in general a pair of functions
  • Flyboy27
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5
Graduate How to Obtain A or U from Inverse Nabla Functions?
  • TheDestroyer
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2
Undergrad Paradoxical definition of the Derivative
  • danne89
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11
Undergrad F(x)={sinx for x<22/7 {mx+b for x>22/7
  • kidia
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4
Undergrad Is There Only One Intersection Point on the y=2^2 Curve for the Tangent Line at P(x0, x0^2)?
  • danne89
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4
Undergrad How Do You Solve a Differential Equation for Wildlife Population Growth?
  • Coldie
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2
Graduate When will D(n!) and D(D(n!)) reach a googol or googolplex?
  • bomba923
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4
Undergrad Appropriate Change of Variables for integration
  • Flyboy27
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6
Undergrad Is the function continuous at x=2 in f(x)= (x^2-4)/(x-2)?
  • klmdad
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3
Undergrad What is the proof of riemann integral?
  • semidevil
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44
Undergrad Simpson's rule can solve cubics exactly
  • zeta101
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5
Undergrad How can I prove that vector c bisects the angle theta between vectors a and b?
  • Perion
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5
Graduate Convergence of Harmonic Series with Omitted 9s in Denominator
  • Nobody1111
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2
Undergrad Find the derivative of the function.
  • klmdad
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3
Undergrad Someone with a math computer program
  • msmith12
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2
Undergrad Finding the limit of a function with e and ln
  • trap
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4
Graduate Numerical analisis and complex integrals
  • eljose
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5
Undergrad Is the derivative equal to one over the derivative of the inverse?
  • Crosson
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2
Undergrad Calculating the exact value of an inverse
  • trap
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3
Undergrad When to use Washer, Shell or Disk
  • Pseudo Statistic
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5
Graduate What is the inverse of the integral transform in complex analysis?
  • eljose
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9
Undergrad Is the Putnam Math Competition More Challenging Than Other Math Competitions?
  • tongos
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Graduate Inverse Rotation Function Question
  • TheDestroyer
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16
Graduate Calculate Integral of cos ax/sinh bx from 0 to infinity | Integration Question
  • Nima
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7
High School Is x=0 Included in the Increasing or Decreasing Range of y=x^2?
  • Kamataat
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Graduate Need some help with basic complex analysis (no proofs)
  • nocheesie
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Graduate Help me understand this proof, so I can present it
  • semidevil
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4
Undergrad Sin(5r)/r Limit Evaluation: How to Handle 5 in the Equation
  • NINHARDCOREFAN
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Undergrad How is the Area of a Polar Curve Derived from a Riemann Sum?
  • DoubleMike
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Graduate How did ostrogradsky prove the divergence theorem?
  • semidevil
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Undergrad Is ln(-x) Defined for Negative Real Numbers?
  • Kamataat
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Graduate Can contour integration always be used to solve integrals?
  • secret2
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Undergrad Finding representations of antiderivatives without a closed form
  • Manchot
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