
Simplify (x+y) (x-y) | Mathway
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如何优雅地证明 x^y+y^x≥1? - 知乎
2024年12月10日 · 当 x=y 时容易证明 f (\frac {1} {e},\frac {1} {e})=2\frac {1} {e}^ {\frac {1} {e}}>1 ,当 y=0 时有 f (x,0)=1 。 因此当 x\geq0,y\geq0 时有 f (x,y)=x^y+y^x\geq1
Equation xy = yx - Wikipedia
Graph of xy = yx. The line and curve intersect at (e, e). In general, exponentiation fails to be commutative. However, the equation has solutions, such as [1]
Solve x+y=xy | Microsoft Math Solver
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Which law is this expression X+ X’.Y=X+Y - Computer Science …
taking LHS X+X'Y= (X+X') (X+Y) OR distributes over AND 1. (X+Y) (X+X'=1) X+Y=RHS 1 is identity for AND. Hence Proved. I don't think this is the proof that the asker is looking for: it doesn't use the algebraic properties of the operators. Also, I find your proof very hard to read.
What does y=y (x) mean? - Mathematics Stack Exchange
It's just a convention, people decided that this y = f (x) means, the value of y at each value of the function f by changing x, in your case the name of the function is y, but you can call it whatever you want, f (x),y (x),t (x),z (x),cat (x),dog (x)... ecc. In your case you have called your function with the same graphical symbol of the result.
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Example 30 - Find dy/dx if y^x + x^y + x^x = a^b - Teachoo
2024年12月16日 · Let u = 𝑦𝑥, v = 𝑥𝑦 & w = 𝑥^𝑥 Now, 𝒖 + 𝒗 + 𝒘 = 𝒂^𝒃 Differentiating 𝑤.𝑟.𝑡.𝑥 (𝑑 (𝑢 + 𝑣 + 𝑤))/𝑑𝑥 = (𝑑 (𝑎^𝑏))/𝑑𝑥 (𝑑 (𝑢))/𝑑𝑥 + (𝑑 (𝑣))/𝑑𝑥 + (𝑑 (𝑤))/𝑑𝑥 = 0 We will calculate derivative of u, v & w separately .
常微分方程:经典方程解法/公式整理 - 知乎
代回原方程,化为 g (D)*y=\varphi (x) 的形式,相当于是个非齐次线性方程,用特征方程随便解下就行了。 记得最后把t换成x。
calculus - Finding $y'$ by implicit differentiation if $x^y=y^x ...
I have it down to $$\ln (y)+ (x/y)y' = y'\ln (x)+y/x$$ The problem is factoring out $y'$, which leads to either $$y'=\frac {\ln (y)- (y/x)} {\ln (x)- (x/y)}$$ or to $$y'=\frac { (y/x)-\ln (y)} { (x/y)-\ln (x)}$$ ...