kb

分數

502,173

最佳解答率

87.00%

等級

Lv 7

I'm a fairly young mathematics instructor devoting more time than I should here assisting others with often interesting mathematics questions. :<) Useful symbols (please copy and paste as needed): ∫ Σ → ∞ Π Δ Φ Ψ Ω Γ ∮ ∇∂ ± ∓ √ ∛ ∅ ° α β γ δ ε ζ η θ ι κ λ μ ν ξ ο π ρ σ τ υ φ χ ψ ω ⁰ ¹ ² ³ ⁴ ⁵ ⁶ ⁷ ⁸ ⁹ ⁺ ⁻ ⁿ ₀ ₁ ₂ ₃ ₄ ₅ ₆ ₇ ₈ ₉ ₊ ₋ ⅓ ⅔ ⅕ ⅖ ⅗ ⅘ ⅙ ⅚ ⅛ ⅜ ⅝ ⅞ ≡ ≈ ≅ ≠ ≤ ≥ · ~ ∤ ◅∈ ∉ ⊆ ⊂ ∪ ∩ ⊥ ô

發問 0 回答 123

2019-03-02 10:28 am

Prove that f(z)=(2z-1)/(z+2) is analytic on its domain and compute its derivative from 1st principle: f'(z) = lim h-->0 {[f(z+h)-f(z)]/h}?

2019-02-21 12:13 pm

Define the function f on the complex numbers by f (0) = 0 and 𝑓(z) =(𝑧̅)^2/𝑧 for z not equal to 0.?

2019-02-16 1:10 pm

|cos(z)| is bounded by 1 for all z in the complex plane, where z is the complex number. True or False? Justify your answer.?

2018-12-03 8:01 am

Help with surface integral?

2018-07-31 4:15 am

Math Help Please?

2018-07-26 9:33 am

Math Help Please?

2018-07-25 1:13 pm

Math Help Please?

2018-02-06 12:55 am

Geometric Progression?

2017-11-01 10:58 am

2017-04-27 11:04 am

The error function, erf(x), is defined by the following?

2017-04-21 8:42 am

please solve this calc III problem?

2017-04-21 7:36 am

please solve this calc 3 problem?

2017-01-19 11:47 pm

Xy'=y+x^n/cos(y/x). For which value of n this differential equation is with homogeneous? How to solve the DE for any n integer?

2016-12-05 5:05 pm

How to find E(X|Y=y) and Var(Y|X=x)?

2016-12-02 1:39 pm

Let X1, . . . , X20 be a sequence of i.i.d. observation from N(5, 16).?

2016-12-02 3:12 am

Joint distribution question?

2016-12-01 3:35 pm

Let X and Y be be two independent random variables such that E(X) = E(Y) = 4 and Var(X) = Var(Y) = 2?

2016-11-07 12:24 am

2016-10-16 11:36 pm

Please help me with the following!?

2016-09-05 1:05 am

3) lim[x->0] [(x^2-2x-1)/(x^2+3x-1)]^[(x^2+2)/x] ?

2016-07-28 7:03 pm

Infimum and supremum, min and max?

2016-04-05 5:36 pm

Can someone please explain why ∑n=1 to ∞ ne^(-nx) converges by the integral test for x>0? Thanks!?

2016-03-29 10:19 pm

Is the function (1+e^(x^2))/(x+1) convergent or divergent? Please explain!?

2016-02-11 4:20 am

how to prove √(√2+√3) is irrational?

2016-02-07 8:24 pm

Multivariable limits with epsilon delta help?

2016-01-31 7:12 pm

Let A be a 2x2 symmetrical matrix. Find all posibilities for A such that A^2 = 0?

2015-12-19 7:39 pm

Integral question?

2015-12-14 3:30 am

Can someone pls help me solve this Jacobian. Let x^3 + y^3 = u+v, x^2+y^2 = u^3+v^3, prove that J ((x,y)/(u,v)) = 1/2((y^2-x^2)/2uv (u-v)).?

2015-12-11 5:00 pm

Find the order of the given elements in the direct product. (i) ([8],[10]) ∈ Z12 × Z18 (ii) ([3],[6],[12],[16]) ∈ Z4 × Z12 × Z20 × Z24?

2015-12-07 4:57 am

The integral of the limit is not the limit of the integrals.?

2015-11-28 4:05 pm

Compute the flux of F⃗ =3(x+z)i⃗ +4j⃗ +3zk⃗ through the surface S given by y=x2+z2, with 0≤y≤4, x≥0, z≥0, oriented toward the xz-plane.?

2015-10-03 3:50 pm

Calculate the Fourier series approximation up to the 5th harmonics?

2015-09-27 4:22 pm

A function of two variables is given by, f(x,y) = e^(2x-3y) Find the tangent approximation to f(0.942,0.625) near (0,0).?

2015-08-12 9:44 pm

Let f be the subset of QXZ defined by f={(m/n,m):m,n belongs to Z, n not equal to 0}. Is f a function from Q to Z? justify your answer?

2015-04-17 3:36 am

Computer Ave Value of f(x,y,z) over region W?

2015-04-06 6:51 am

Multivariable Questions?

2015-03-31 12:56 am

2015-03-23 1:26 am

Prove that if A and B are sequentially compact in R^n, then the set {(x,y) | x ∈ A, y ∈ B} is a sequentially compact set in R^2n.?

2015-03-20 6:40 pm

Lagrange multipliers closest point?

2015-03-12 7:24 pm

What is the solution to the IBVP PDE $u_{tt} = u_{xx}$, $-\infty < x < \infty$ $0 < t < \infty$ ICs u(x,0) = e^{-x^{2}} u_{t}(x,0) = 0?

2015-03-01 6:32 pm

Find the minimum value of the function f(x,y,z) = (3x + y - 2z)/sqrt(x^2 + y^2 + z^2)?

2015-02-02 5:19 am

Does the series from k = 1 to infinity k^3 e^-k converge? I think it diverges, but I'm not sure why.?

2015-01-27 6:57 am

Linear Algebra. Help!!?

2015-01-26 4:21 pm

Prove that 1 - 3x + 6x² - 10x³ + ... does not converge for |x| >= 1.?

2014-10-27 12:44 pm

how to use Stokes' Theorem to evaluate following equation: F·dr, F(x,y,z)=(y+sinx)i+(z+cosy)j+xk?

2014-10-14 1:44 am

how to find the flux of F across the surface S?

2014-10-14 1:41 am

how to find the area of the part paraboloid x=y^2+z^2 that lies inside the cylinder y^2+z^2 = 9?

2014-10-14 1:46 am

how to use the Gauss DivergenceTheorem to calculate the net outward flux of F?

2014-09-23 11:49 am

How to solve this problem using spherical coords?

2014-08-26 12:29 pm

how to evaluate the following integral: ∫ (0 to 1)∫ sqrt(y) to 1 e.^x.^3 dx dy?

1 下一頁

本頁收錄日期: 2021-04-12 19:16:12
總收錄問題: 0 / 1 (收錄率: 0.00%)
總收錄回答: 123 / 42160 (收錄率: 0.29%)