9000063409
Level:
B
Solve the following equation.
\[
1 + 2x + 4x^{2} + 8x^{3}+\cdots = 3
\]
\(x = \frac{1}
{3}\)
\(x = \frac{1}
{5}\)
\(x = \frac{1}
{2}\)
\(x = \frac{3}
{4}\)
B
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.
\[
\lim _{n\to \infty }\log 3^{n}
\]
\(\infty \)
\(- 1\)
\(0\)
\(3\)
9000063106
Level:
B
Differentiate the following function.
\[
f(x) =\sin x\cos x
\]
\(f'(x) =\cos 2x,\ x\in \mathbb{R}\)
\(f'(x) = 1,\ x\in \mathbb{R}\)
\(f'(x) = -\cos 2x,\ x\in \mathbb{R}\)
\(f'(x) = -\sin x\cos x,\ x\in \mathbb{R}\)
9000046605
Level:
B
Identify an inequality which is true for
\(x = \frac{\pi } {6}\).
\(\sin x\cdot \cos x < \frac{\sqrt{2}}
{2} \)
\(\cos 2x > \frac{\sqrt{2}}
{2} \)
\(\mathop{\mathrm{tg}}\nolimits (-x) > 0\)
\(\mathop{\mathrm{cotg}}\nolimits ^{2}x < 0\)
9000062407
Level:
B
Find the tangent to the function \(f(x) =\ln x\)
at the point \(T = [1,y_{0}]\).
\(y = x - 1\)
\(y = x\)
\(y = x + 1\)
\(y = -x\)
9000063107
Level:
B
Differentiate the following function.
\[
f(x) =\cos x(1 +\sin x)
\]
\(f'(x) =\cos ^{2}x -\sin ^{2}x -\sin x,\ x\in \mathbb{R}\)
\(f'(x) = -\sin x\cos x,\ x\in \mathbb{R}\)
\(f'(x) =\cos x,\ x\in \mathbb{R}\)
\(f'(x) =\sin x +\sin ^{2}x -\cos ^{2}x,\ x\in \mathbb{R}\)
9000046606
Level:
B
Identify an inequality which is true for
\(x = \frac{3\pi }
{4}\).
\(\mathop{\mathrm{cotg}}\nolimits (-x) > 0\)
\(\sin 2x > 0\)
\(\mathop{\mathrm{tg}}\nolimits x\cdot \mathop{\mathrm{cotg}}\nolimits x < \frac{\sqrt{2}}
{2} \)
\(\cos ^{2}x < 0\)
9000062408
Level:
B
Find the points in which the tangent to the curve
\(y = x^{3}\) has a
slope \(m = 3\)?
\(T_{1} = [1,1],\ T_{2} = [-1,-1]\)
\(T_{1} = [1,-1],\ T_{2} = [-1,1]\)
\(T_{1} = [-1,1],\ T_{2} = [-1,-1]\)
\(T_{1} = [1,-1],\ T_{2} = [-1,-1]\)