Maths Exam

1. Solution of linear equations

We have the following equations: $$\begin{eqnarray} 6 x +2y &=& 2 \\ 3 x +2y &=& 2 \end{eqnarray}$$
Correct Answer
$$ x=0, y=1 $$

2. Differentiation A

Differentiate the following equation: $$\cos\left({x}^{2} + \cos\left(x\right)\right)$$
Correct Answer
$$(-\sin\left({x}^{2} + \cos\left(x\right)\right)\left(2x - \sin\left(x\right)\right))$$

3. Differentiation A

Differentiate the following equation: $$\sin\left(\ln\left({2}^{x}\right)\right)$$
Correct Answer
$$\cos\left(\ln\left({2}^{x}\right)\right)\ln\left(2\right)$$

4. Differentiation B

Differentiate the following equation: $$\left(\sqrt{x} + \sin\left(x\right)\right)\cos\left(5 - x\right)$$
Correct Answer
$$\left(\frac{1}{2\sqrt{x}} + \cos\left(x\right)\right)\cos\left(5 - x\right) + \left(\sqrt{x} + \sin\left(x\right)\right)\sin\left(5 - x\right)$$

5. Integration

Please carry out the following integral: $$ \int \cos\left(6x\right) dx$$
Correct Answer
$$ \frac{\sin\left(6x\right)}{6} $$

6. Integration

Please carry out the following integral: $$ \int \sqrt{-2x + 1} dx$$
Correct Answer
$$ \frac{(-{\left(-2x + 1\right)}^{\frac{3}{2}})}{3} $$

7. Consider the following differential equation: $$ 4\frac{d^2y}{dx^2} + 5\frac{dy}{dx} + y = 0 $$

Find the general solution to the above equation.
Correct Answer
$$ A\exp\left(\frac{(-x)}{4}\right) + B\exp\left((-x)\right) $$

8. Consider the following series: $$ \sum_{j=0}^{13} j + 5 $$

What does the sum evaluate to?
Correct Answer
$$ 161$$

9. Solution of linear equations

We have the following equations: $$\begin{eqnarray} 2 x +2y &=& 2 \\ -6 x -3 y &=& 2 \end{eqnarray}$$
Correct Answer
$$ x=\frac{-5}{3}, y=\frac{8}{3} $$

10. Differentiation A

Differentiate the following equation: $$\ln\left(\sqrt{x}\right)\sin\left(-3x\right)$$
Correct Answer
$$\frac{\sin\left(-3x\right)}{2x} - 3\ln\left(\sqrt{x}\right)\cos\left(-3x\right)$$


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