9000073405
Level:
A
Find the sum of the following infinite series.
\[
\sqrt{2} - 1 + \frac{\sqrt{2}}
{2} -\frac{1}
{2} + \frac{\sqrt{2}}
{4} -\frac{1}
{4}+\cdots
\]
\(2\sqrt{2} - 2\)
\(\sqrt{2} - 1\)
\(2\sqrt{2} + 2\)
\(\infty \)
A
9000073406
Level:
A
Find the sum of the following infinite series.
\[
\sum _{n=1}^{\infty }\left (\frac{\sqrt{2} - 1}
{\sqrt{2}} \right )^{n-1}
\]
\(\sqrt{2}\)
\(\frac{\sqrt{2}+1}
{\sqrt{2}} \)
\(\frac{\sqrt{2}}
{2} \)
Series diverges.
9000070802
Level:
A
Differentiate the following function.
\[
f(x) = 3 - 2\cos x
\]
\(f'(x) = 2\sin x;\ x\in \mathbb{R}\)
\(f'(x) = 3 + 2\sin x;\ x\in \mathbb{R}\)
\(f'(x) = 3 - 2\sin x;\ x\in \mathbb{R}\)
\(f'(x) = 2\cos x;\ x\in \mathbb{R}\)
9000071206
Level:
A
Given the function \(f(x) =\sin x +\cos x\), find its
primitive function \(F\) so that the graph of \(F\) passes through the point \(A = \left [ \frac{\pi }{2};3\right ]\).
\(F(x) =\sin x -\cos x + 2\)
\(F(x) =\cos x -\sin x + 4\)
\(F(x) = -\cos x +\sin x + 4\)
9000070401
Level:
A
Given the function \(f(x) = x^{2} + x - 2\), find
the intervals where \(f\)
is an increasing function.
\(\left (-\frac{1}
{2};\infty \right )\)
\(\left (-3;\infty \right )\)
\(\left (-2;\infty \right )\)
\(\left (-1;\infty \right )\)
9000070402
Level:
A
Given the function \(f(x)= x^{2} - 2x - 8\), find
the intervals where \(f\)
is a decreasing function.
\(\left (-\infty ;1\right )\)
\(\left (-\infty ;8\right )\)
\(\left (-\infty ;2\right )\)
\(\left (-\infty ;4\right )\)
9000070403
Level:
A
Given function \(f(x) = -x^{2} + 2x + 3\), find
the intervals where \(f\)
is an increasing function.
\(\left (-\infty ;1\right )\)
\(\left (-\infty ;2\right )\)
\(\left (-\infty ;3\right )\)
\(\left (-\infty ;6\right )\)
9000070404
Level:
A
Given function \(f(x)= -x^{2} + 4x + 12\), find
the intervals where \(f\)
is a decreasing function.
\(\left (2;\infty \right )\)
\(\left (1;\infty \right )\)
\(\left (-4;\infty \right )\)
\(\left (-6;\infty \right )\)
9000070405
Level:
A
Given function \(f(x)= x^{3} + 3x^{2} - 24x + 5\), find
the intervals where \(f\)
is a decreasing function.
\(\left (-4;2\right )\)
\(\left (-3;5\right )\)
\(\left (-3;3\right )\)
\(\left (-5;1\right )\)
9000070406
Level:
A
Given function \(f(x)= x^{3} + 6x^{2} - 15x + 7\), find
the intervals where \(f\)
is an increasing function.
\(\left (-\infty ;-5\right )\)
\(\left (-\infty ;-3\right )\)
\(\left (-1;\infty \right )\)
\(\left (-3;\infty \right )\)