9000065307
Level:
B
In the arithmetic sequence given by the first term
\(a_{1} = 4\) and the common
difference \(d = 2\)
find the sum of the first twelve terms of the sequence.
\(s_{12} = 180\)
\(s_{12} = 72\)
\(s_{12} = 120\)
\(s_{12} = 168\)
B
9000065308
Level:
B
For the arithmetic sequence with the first term $a_1=3$ holds $a_n=27$ and the sum of the first $n$ terms is $195$. Find $n$.
\(n = 13\)
\(n = 14\)
\(n = 15\)
\(n = 16\)
9000065504
Level:
B
Evaluate the following integral on the interval \((0;+\infty)\).
\[
\int (1 -\sqrt{x})(1 + \sqrt{x})\, \mathrm{d}x
\]
\(x -\frac{1}
{2}x^{2} + c,\ c\in \mathbb{R}\)
\((x -\frac{1}
{2}x^{2})(x + \frac{1}
{2}x^{2}) + c,\ c\in \mathbb{R}\)
\(x -\frac{1}
{2}x^{\frac{1}
{2} } + c,\ c\in \mathbb{R}\)
\((x -\frac{1}
{2}x^{-\frac{1}
{2} })(x + \frac{1} {2}x^{-\frac{1}
{2} }) + c,\ c\in \mathbb{R}\)
9000063409
Level:
B
Solve the following equation.
\[
1 + 2x + 4x^{2} + 8x^{3}+\cdots = 3
\]
\(x = \frac{1}
{3}\)
\(x = \frac{1}
{5}\)
\(x = \frac{1}
{2}\)
\(x = \frac{3}
{4}\)
9000063602
Level:
B
Find the following limit.
\[
\lim _{n\to \infty }(-1)^{n} \frac{3}
{2n + 1}
\]
\(0\)
\(-\frac{3}
{2}\)
\(\frac{3}
{2}\)
\(- 1\)
9000063604
Level:
B
Find the following limit.
\[
\lim _{n\to \infty }\sin 2\pi n
\]
\(0\)
\(1\)
\(- 1\)
\(\infty \)
9000063605
Level:
B
Find the following limit.
\[
\lim _{n\to \infty }\log 3^{n}
\]
\(\infty \)
\(- 1\)
\(0\)
\(3\)
9000063607
Level:
B
Find the following limit.
\[
\lim _{n\to \infty } \frac{1}
{\log 10^{n}}
\]
\(0\)
\(1\)
\(10\)
\(\infty \)
9000063608
Level:
B
Find the following limit.
\[
\lim _{n\to \infty }\frac{2^{n} + 3^{n}}
{3^{n}}
\]
\(1\)
\(2\)
\(3\)
\(\infty \)
9000063806
Level:
B
Consider the sequence \(a_{n+1} = a_{n} - 2a_{n-1}\)
with \(a_{3} = 0\)
and \(a_{4} = -16\).
Find \(a_{2} - a_{1}\).
\(4\)
\(16\)
\(- 4\)
\(8\)