Задача 15263 y' = e^x + e^(-x) / e^x - e^(-x)... Условие.C. Find $E(Y^2)$ and deduce $\mathrm{Var}(Y)$. B and C I can do if I find A but can anybody explain to me how this is done. Remark: To find $E(Y)$, I would suggest not using the density.In mathematics, an exponential function is a function of the form. where b is a positive real number, and the argument x occurs as an exponent. For real numbers c and d, a function of the form. is also an exponential function, since it can be rewritten as.Conditional expectations E(X|Y ) as random variables. Conditional expectations were discussed in lectures (see also the second part of Notes 3). The goal of these notes is to provide a summary of...$$ \left( e^x \right) ' = e^x $$.
Finding the probability density function of $Y=e^X$, where $X$ is...
This is a kind of perfect example of successive differenciation or what we say as CHAIN RULE. Let us say a function y= [math]e^x...(1)[/math].Популярные задачи. Алгебра. График y=e^x.
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Exponential function - Wikipedia
Sin[x]^x, {x,-Pi,E},{y,0,1}.An integrating factor, e^(integral of -1dx)=e^(-x) can be used. Multiplying each term by this gives (e^-x)y'-(e We can reverse the product rule. (y e^(−x))' = 1. Now, integrate across with respect to x.. Получим: y′=e4x−12′=4e4x−12;y′(3)=4e4⋅3−12=4e12−12=4e0=4. Ответ: \(4\).y=e^x. Log InorSign Up.
Основные функции
: x^aмодуль x: abs(x)
Построение графиков функцийСервис поддерживает возможность построения графиков функций как вида , так и вида . Для того, чтобы построить график функции на отрезке нужно написать в строке: f[x],x, a, b. Если Вы хотите, чтобы диапазон изменения ординаты был конкретным, например , нужно ввести: f[x],x, a, b,y, c, d.
Примерыx^2+x+2, x,-1,1;x^2+x+2, x,-1,1,y,-1,5;Sin[x]^x, x,-Pi,E;Sin[x]^x, x,-Pi,E,y,0,1.Если Вам требуется построить сразу несколько графиков на одном рисунке, то перечислите их, используя союз «И»:f[x]&&g[x]&&h[x]&&…&&t[x],x, a, b.
Примерыx&&x^2&&x^3, x,-1,1,y,-1,1;Sin[x]&&Sin[5x]&&Sin[10x]&&Sin[15x], x,-5,5.Для того, чтобы построить график функции на прямоугольнике , нужно написать в строке: f[x, y],x, a, b,y, c, d. К сожалению, диапазон изменения аппликаты пока что нельзя сделать конкретным. Тем не менее, интересно отметить, что при построении графика функции Вы получите не только поверхность, которую она определяет, но и «контурную карту» поверхности (линии уровня).
ПримерыSin[x^2+y^2],x,-1,-0.5,y,-2,2;xy,x,-4,4,y,-4,4.Sel elektrokimia & Hukum faraday
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