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furred    
a. 长着软毛的,毛皮制的,穿毛皮的

长着软毛的,毛皮制的,穿毛皮的

furred
adj 1: covered with a dense coat of fine silky hairs; "furred
animals"; "a furry teddy bear" [synonym: {furred}, {furry}]


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  • Solving a system of ordinary differential equations with complex roots
    Solving a system of ordinary differential equations with complex roots Ask Question Asked 6 years, 4 months ago Modified 6 years, 2 months ago
  • What is a meaning of a complex roots? - Mathematics Stack Exchange
    0 In the simplest sense, what does a complex root on the complex plane actually mean? For polynomial equations a root is a x-coordinate of where the curve crosses the x-axis I just find it strange how the roots of complex numbers are symmetrical about the origin of the complex plane, yet no such symmetry exists for polynomial roots
  • complex numbers - What is $\sqrt {i}$? - Mathematics Stack Exchange
    The square root of i is (1 + i) sqrt (2) [Try it out my multiplying it by itself ] It has no special notation beyond other complex numbers; in my discipline, at least, it comes up about half as often as the square root of 2 does --- that is, it isn't rare, but it arises only because of our prejudice for things which can be expressed using small integers
  • Complex roots of real polynomials and real roots of their derivatives
    Applied to quartic equations with two sets of complex conjugate roots, the theorem implies that in general the roots of the quartic are at the vertices of a quadrilateral in the complex plane and the roots of the derivative (real and otherwise) lie inside this quadrilateral
  • Is there an intuitive way of visualising complex roots?
    The axis of symmetry is the real part of the complex roots; the imaginary part can be found by subtracting the square of the axis (here, $4$) from the intercept ($13-4=9$) and then taking the square root ($3$) This assumes the roots come in conjugate pairs (so the coefficients of your quadratic are real numbers)
  • Why cant a polynomial of degree $n$ have less than $n$ (complex) roots . . .
    Regardless, once you know any non-constant complex polynomial has at least one root, the proof that the number of roots is exactly the degree follows, for instance, by induction on the degree
  • Explaining the nature of complex roots of a quartic
    Thank you for this I think I will start by demonstrating the distributive and commutative properties of the complex conjugate, then using those to state that if a complex numbers is a root of a polynomial, so is its conjugate, and therefore complex roots must come in conjugate pairs Then I can just list the cases for each order polynomial
  • Graphically solving for complex roots -- how to visualize?
    We can present complex roots to equation on the "complex plane" with one axis for the real part and the other for the imaginary part You can play with, for instance, WolframAlpha, to give it a polynomial equation to solve and get a display of the complex roots If you look up "DeMoivre's Theorem" online, you will find something interesting about the roots of equations $ \ z^n \ = \ c
  • Imaginary vs Complex roots - Mathematics Stack Exchange
    Thus, if you're asked to determine whether a polynomial (or generally an equation) has imaginary roots, you should consider it as checking if it has purely imaginary roots, else you would be asked about complex roots
  • How to do partial fraction decomposition with complex roots?
    How to do partial fraction decomposition with complex roots? Ask Question Asked 7 years, 1 month ago Modified 7 years, 1 month ago





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