Maths Exam

1. Solution of linear equations

We have the following equations: $$\begin{eqnarray} x -2 y &=& 3 \\ -5 x -2 y &=& 1 \end{eqnarray}$$
Correct Answer
$$ x=\frac{1}{3}, y=\frac{-4}{3} $$

2. Differentiation A

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

3. Differentiation A

Differentiate the following equation: $$\exp\left(\sin\left(6 + x\right)\right)$$
Correct Answer
$$\exp\left(\sin\left(6 + x\right)\right)\cos\left(6 + x\right)$$

4. Differentiation B

Differentiate the following equation: $$\frac{(-x\sin\left(x\right)) - 6\sin\left(\frac{5}{x}\right)}{6}$$
Correct Answer
$$\frac{(-\left(\sin\left(x\right) + x\cos\left(x\right)\right)) - \frac{-30\cos\left(\frac{5}{x}\right)}{{x}^{2}}}{6}$$

5. Integration

Please carry out the following integral: $$ \int {\left((-x) - 4\right)}^{-1} dx$$
Correct Answer
$$ (-\ln\left((-x) - 4\right)) $$

6. Integration

Please carry out the following integral: $$ \int {\left(x - 5\right)}^{1} dx$$
Correct Answer
$$ \frac{{\left(x - 5\right)}^{2}}{2} $$

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

Find the general solution to the above equation.
Correct Answer
$$ A\exp\left(x\right) + B\exp\left(-5x\right) $$

8. Consider the following series: $$ \sum_{j=0}^{13} 2\left(j + 4\right) $$

What does the sum evaluate to?
Correct Answer
$$ 294$$

9. Solution of linear equations

We have the following equations: $$\begin{eqnarray} 4 x -5 y &=& 1 \\ -4 x +6y &=& 4 \end{eqnarray}$$
Correct Answer
$$ x=\frac{13}{2}, y=5 $$

10. Differentiation A

Differentiate the following equation: $$\exp\left(\sin\left(6x\right)\right)$$
Correct Answer
$$6\exp\left(\sin\left(6x\right)\right)\cos\left(6x\right)$$


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