Una escalera se recuna contia un edif como se indica en el dibojo, la esca Tiene ram de largo, la distancía al tore de la escalera es 2 m más grande que la distancia \( x \) dal edifici encuentra la distancia al to pe de la escalera.

Expand and simplify. \( \left(\frac{1}{3}\right)^{2}=\square \)

\( \int y \operatorname { coc } 3 y ^ { 2 } \cot 3 y ^ { 2 } d y = \)

Select the correct answer from each drop-down menu. How do the different spheres of Earth interact? Volcanic eruptions are natural phenomena in the forming new landmasses. Volcanoes can have an effect on the Volcanic ash and gas can also pollute the

3. ลิขสิทธ์คืออะไร อธิบายความหมายของซอฟต์แวร์โจรสลัด กฎหมายเกี่ยวกับลิขสิทธิ์ต่างๆของไทย

Answer any five questions from this section \[ \text { All questions carry equal marks. } \] (a) Prove that if \( \frac{z-6 i}{z+8} \) is real, then the locus of the point representing the complex number \( Z \) is a straight line. Hence state the gradient of the line. (06 marks) (b) If \( Z_{1}=\frac{2 i}{1+3 i} \) and \( Z_{2}=\frac{3+2 i}{5} \); (i) Represent \( Z_{1} \) on an Argand diagram (ii) Find \( \left|Z_{1}-Z_{2}\right| \)