循环5 次就能得到结果,算法效率最优。 functioncroot4($num){$guess=$num/3;while(true){$try=$guess*$guess*$guess;if(abs($try-$num)>=0.0000000001)$guess=$guess*(($try+2*$num)/(2*$try+$num));elsereturn$guess;}}
其实这个还是比较好理解的。cube的意思是立方，root的意识是根，合起来就是立方根、就是字面上的意思。 Extraction就是取出；抽出的意思，连在一起就是开立方，也不难理解 英语翻译问题
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Instead, factoring or graphing are used to find the roots of cubic functions. How do you solve a cubic equation without a quadratic? There are two ways to solve a cubic equation without using a quadratic formula: factoring and graphing. These are the steps to use to find the roots of a...
Create an iterator which computes the cube root of each iterated value. nodejsjavascriptnodemathstdlibiteratormathematicspowerrootnode-jscubeiterablecubiciteratecbrt UpdatedFeb 2, 2025 JavaScript Compute the cube root of each element in a single-precision floating-point strided array. ...
Public Member Functions cubicEqn () Construct null. More... cubicEqn (const Foam::zero) Construct initialized to zero. More... cubicEqn (const scalar a, const scalar b, const scalar c, const scalar d) Construct from components. More... scalar a () const scalar b () const scalar c ...
Public Member Functions TypeName ("bodyCentredCubic") Runtime type information. More... bodyCentredCubic (const dictionary &initialPointsDict, const Time &runTime, Random &rndGen, const conformationSurfaces &geometryToConformTo, const cellShapeControl &cellShapeControls, const autoPtr< backgroundMesh...
Given functions are f(x) = x^3 + 2 and g(x) = the cube root of (x 2). Find (g o f)(x). Determine whether the equation represents y as a function of x. x = 5 Determine whether the equation represents y as a function of x. y = 8 ...
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Find m and b. If f(x) = 3 + \frac{2}{x} + \frac{3}{x^2}, find f'(x). f'(x) = Find f'(4). f'(4) = Given functions are f(x) = x^3 + 2 and g(x) = the cube root of (x 2). Find (g o f)(x). If f(x) = 5*sqrt(x) (x^3 - 8*...