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Professional Development

6 Qs

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Assessment

Quiz

Mathematics

Professional Development

Practice Problem

Medium

Created by

Lala Huseynova

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6 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

 n=1n(2n1)2(2n+1)2\sum_{n=1}^{\infty}\frac{n}{\left(2n-1\right)^2\left(2n+1\right)^2}  найти сумму ряда

 15\frac{1}{5}  

 18\frac{1}{8}  

 14\frac{1}{4}  

 13\frac{1}{3}  

2.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

 n=1n!nn\sum_{n=1}^{\infty}\frac{n!}{n^n}  Показать сходимость ряда с помощью признакуа Даламбера

не сходится

сходится

нужны дальнейшие исследования

0

3.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

 5x+52x22!+53x33!+....5x+\frac{5^2x^2}{2!}+\frac{5^3x^3}{3!}+....  Найти область сходимости ряда

(-1ı1)

 (;+)\left(-\infty;+\infty\right)  

(-2ı1)

(-1ı5)

4.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

 u=x22xy+3y1u=x^2-2xy+3y-1  Найти компоненты градиента в точке А(1;2) функции

(-2;1)

(-2;2)

(-3;2)

(-2;0)

5.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

 u=x2xy+y2+3x2y+1u=x^2-xy+y^2+3x-2y+1  Найти критическую точку функции

(1;2)

 (56;16)\left(\frac{5}{6};\frac{1}{6}\right)  

 (43;13)\left(-\frac{4}{3};\frac{1}{3}\right)  

 (45;15)\left(-\frac{4}{5};\frac{1}{5}\right)  

6.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

 z=exyz=e^{xy}  .Найти смешанную производную

 (1+x)exy\left(1+x\right)e^{xy}  

 (1+y)exy\left(1+y\right)e^{xy}  

 (2+x)exy\left(2+x\right)e^{xy}  

 (1+x)\left(1+x\right)