Maths Exam

1. Solution of linear equations

We have the following equations: $$\begin{eqnarray} -2 x -5 y &=& 3 \\ 2 x +4y &=& 3 \end{eqnarray}$$
Correct Answer
$$ x=\frac{27}{2}, y=-6 $$

2. Differentiation A

Differentiate the following equation: $${x}^{3.5} + \sin\left(\frac{4}{x}\right)$$
Correct Answer
$$3.5{x}^{2.5} + \frac{-4\cos\left(\frac{4}{x}\right)}{{x}^{2}}$$

3. Differentiation A

Differentiate the following equation: $$\exp\left({x}^{-1} - \ln\left(x\right)\right)$$
Correct Answer
$$\exp\left({x}^{-1} - \ln\left(x\right)\right)\left(\frac{-1}{{x}^{2}} - \frac{1}{x}\right)$$

4. Differentiation B

Differentiate the following equation: $$\frac{2\sqrt{\exp\left(x\right)}}{i\sqrt{x}}$$
Correct Answer
$$\frac{\sqrt{\exp\left(x\right)}}{i\sqrt{x}} - \frac{\sqrt{\exp\left(x\right)}}{i{x}^{1.5}}$$

5. Integration

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

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: $$ -6\frac{d^2y}{dx^2} - \frac{dy}{dx} + 5y = 0 $$

Find the general solution to the above equation.
Correct Answer
$$ A\exp\left((-x)\right) + B\exp\left(\frac{5x}{6}\right) $$

8. Consider the following series: $$ \sum_{j=0}^{13} 2\left(j - 3\right) $$

What does the sum evaluate to?
Correct Answer
$$ 98$$

9. Solution of linear equations

We have the following equations: $$\begin{eqnarray} 4 x -y &=& 1 \\ -2 x +3y &=& 3 \end{eqnarray}$$
Correct Answer
$$ x=\frac{3}{5}, y=\frac{7}{5} $$

10. Differentiation A

Differentiate the following equation: $$\exp\left({x}^{2} - \left(6 + x\right)\right)$$
Correct Answer
$$\exp\left({x}^{2} - \left(6 + x\right)\right)\left(2x - 1\right)$$


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