Edexcel ALevel Maths, Pure Paper 2, June 2018
Question Walkthroughs

Pure Paper 2, 2018,Q11. g(x) = 2x+5 / x3
a. Find gg(5) b. State the range of g c. Find g1(x), stating its domain. 

Pure Paper 2, 2018,Q21. Relative to a fixed origin O.
the point A has position vector (2i + 3j  4k), the point B has position vector (4i  2j + 3k), and the point C has position vector (ai + 5j  2k), where a is a constant and a < 0 D is the point such that AB = BD. a. Find the position vector of D. Given AC=4 b. find the value of a. 

Pure Paper 2, 2018,Q33a. 'If m and n are irrational numbers, where m=/n, then mn is also irrational.' Disprove this statement by means of a counter example.
bi. Sketch the graph of y = x + 3 ii. Explain why x + 3 is larger than or equal to x + 3 for all real values of x. 